Le'Veon Bell, Danny Lansanah understands that you picked up a first down. He just doesn't want you to rub it in by pointing out that fact.
On a 1st-and-10 in the third quarter, Bell picked up a first down after catching a pass from Pittsburgh Steelers receiver Antonio Brown.
When the Steelers running back went to signal a first down, the Tampa Bay Buccaneers linebacker quickly swatted it down.
Bell picked up 17 yards on the play, so even without the signal, it was fairly obvious that he got the first down.