Falcons Coach Raheem Morris calls London pretending to fire a gun – about a week honoring victims of a school shooting near Atlanta – 'a mistake.'

Falcons wide receiver Drake London was penalized after catching a touchdown pass in the final minute of Atlanta’s 22-21 victory in Philadelphia on Monday night for pretending to shoot in the air, a violation of a longstanding NFL rule that prohibits such gestures.

Falcons receiver Drake London said Wednesday that he's "not too happy" with his touchdown celebration in Atlanta's win over the Eagles on Monday night when he pretended to shoot a gun into the air following his clutch score late in the fourth quarter.