What Other Drivers Have Pulled a "Kyle Busch"?

With all this recent talk about Kyle Busch running in the Camping World East/West combined race last weekend at Iowa Speedway, it got me wondering, who else has raced in lower divisions during their time in one of NASCAR's top three series?

• May 17, 2009: On the same day that Busch was in Iowa, fellow Cup driver Paul Menard was competing in the ARCA series at Toledo. On lap 42 Menard put the shove on ARCA regular Patrick Sheltra sending him spinning into the wall and dropping him to sixth in points.
• January 25, 2009: Camping World Truck series driver Ron Hornaday Jr. made an in-car appearance at the Toyota All-Star Showdown. Around the middle of the race Hornaday sparked a wreck that caused damage to numerous regulars. He also caused another 12-car wreck when he over drove the corner and made hard contact with the 15 of Brian Ickler.
• May 18, 2008: Kasey Kahne made an appearance in last year's East/West combination race bringing home a second place finish behind Brian Ickler.
• May 20, 2007: Kevin Harvick drove in the 2007 East/West combination race and finished second to then 16-year-old phenom Joey Logano.
• Numerous times: Multiple times NASCAR drivers have returned to their dirt roots and ran races such as the world famous Chili Bowl. For example in 2009 NASCAR was represented in the dirt by J.J. Yeley, Jason Leffler, Justin Allgaier, Kasey Kahne, Ricky Stenhouse Jr., and Bryan Clauson. Tony Stewart has also won this event twice since beginning his NASCAR career.

Now obviously this isn't a complete list as I have not been able to find a "complete" list of these kind of events so if there is one or two that you know of feel free to comment and let us know.

Also I want to know what most people said about these drivers when they competed in what some have called the "lesser" series and if you said the same thing then that you did about Kyle Busch.