There are some things about NFL training camps that you just can't know unless you're there.
If you can't be there, the next-best thing is to check out photos from those media photographers who are at camp. Presumably, that's why you're here.
By this point, you've seen all the training camp previews you can stand and now you're looking for some action.
Don't worry. The preseason is mere days away, which means the regular season is only weeks away.
While you're waiting for those, have a look at what's going on with the Lions so far in camp.
Stop me if you've heard this one before: Louis Delmas is back at practice, but limited.
Delmas is excited to be back and he showed his enthusiasm in his first day back to practice, according to Carlos Monarrez of the Detroit Free Press.
However, Delmas was limited to individual drills, and seems to only be able to do that about every other day. The Lions are going to try to work him up to full participation without putting too much stress on his knee, but it's a little concerning that the team has to do that with a 26-year-old safety.
The Lions need No. 5 overall draft pick Ziggy Ansah to be a major contributor to the Lions' defense this year.
So naturally, they need him to stay healthy long enough to get there.
Ansah rolled his ankle on the first day of training camp according to Dave Birkett of the Detroit Free Press, but head coach Jim Schwartz insists it isn't serious.
Training camp often sees players leave practice for things they would play through in a game situation. Right now, precaution levels are at maximum, so there probably isn't anything to worry about with Ansah—except for the fact that there isn't anyone in Lions' camp who needs practice reps more than him.
Matthew Stafford is accustomed to looking untouchable in practice and in training camp. He's a good quarterback, but his efficiency was always a little bit unrealistic.
It's not talked often about how much players develop by playing against top competition in practice, but it stands to reason that Stafford could take a huge step in his development if he's able to improve against a secondary with actual talent.
It's hard to say whether or not you can really call Nate Burleson a "fan favorite," but he certainly does aspire to being it.
Being one of the most intelligent and vocal member of the team is one thing, but he also has people lauding his quick comeback from last year's broken leg.
Burleson is one of those guys who always talks, whether to his teammates, fans or the media. He'll make a great broadcast persona someday, but for now, he's still a great guy to talk to at camp.
Incidentally, he's also a great guy to follow on Twitter, if that's your thing.
Breaking news: Calvin Johnson is good at football.
Cornerback Chris Houston, pictured here doing everything a cornerback can legally do to break up a pass, said that Johnson is even better than last year, via Dave Birkett of the Detroit Free Press. Houston would know, since he's been covering him in practice for the last four years.
Johnson will be hard-pressed to replicate his record-setting numbers from 2012, but that's not a bad thing. If the Lions' offense is effectively balanced, Johnson's numbers will decline simply on account of him not being the team's only legitimate weapon for once.
It's relatively well-known that one of the first things to happen in training camp is the conditioning test.
It's not very often that anyone fails it, and when they do, it's usually a bad sign, as former Washington Redskin Albert Haynesworth found out when he flunked the 300-yard sprint under head coach Mike Shanahan.
Luckily, Ndamukong Suh didn't fail the test. In fact, he made it look easy. Jim Schwartz, via Tim Twentyman of the Lions' official website, said that Suh "made a mockery" of the test.
So the good news is, Suh's reportedly in the best shape of his life. That's a good start to what could be a career season for him.
Darius Slay is the highest-drafted cornerback by the Lions since Terry Fair in 1998 and it appears they're ready to treat him as such.
After Ron Bartell suffered a shoulder injury that doesn't appear serious, but has kept him out of practice, Slay immediately started taking first-team reps with Bill Bentley remaining in the slot.
This is most likely a reflection of the Lions' long-term plans for Slay. If he performs well—and by all accounts, he has—he might just stay there, even after Bartell's return.
Contrary to what you see in this training camp photo of Reggie Bush testing his arm, the Lions are not trying a novel new way to keep from needing a third quarterback.
Most likely, Bush is just tossing the ball back to a teammate. Still, it's worth noting that Bush looks and feels great so far, according to Tim Twentyman of DetroitLions.com, which is a good sign for a guy whose health was a question coming in.
Twentyman points out that Bush has taken a great deal less punishment than most running backs his age, which has to be at least a small comfort considering that Bush is only a couple of years away from turning the dreaded 30.
It's hard telling what Larry Warford is doing even touching a football, much less throwing it, but that's hardly important.
What is important is that Warford has started taking first-team reps, according to Gillian Van Stratt at MLive.com, after the Lions' coaching staff saw improvement in his footwork after only four days.
That's a good sign for Warford, who was expected to compete for (and win) the starting right guard spot immediately. He has been looking for things to fix in his technique and he has been fixing them.
If he refines his technique and combines it with his brute size and strength, watch out.
Riley Reiff has been quiet thus far in training camp, but in the best way possible.
You know that old adage about long snappers, where you're only aware of them if they make a mistake? Reiff has been good in that kind of way, according to Tim Twentyman, of DetroitLions.com.
There was talk of the Lions drafting a left tackle this year, but many forget that the Lions expected Reiff to be a left tackle when they drafted him. Now he's fulfilling that role and the early returns have been encouraging.
Ideally in the future, Lions fans will continue to not talk about Reiff—or whoever he's blocking.
Take this with as much salt as you like because in training camp, everybody spins everything positively. Everybody is either really good at something or "making progress" on it.
But Schilens is a sixth-year veteran who has been with the Lions for only a short time. Perhaps his biggest challenge was going to be catching up with a team he hadn't spent the offseason with.
If Schilens has already adjusted well, as Burleson says he has, simply making the 53-man roster might be setting the bar much too low for him.