If Peyton Manning doesn't lead the Broncos down and score late in the game, Von Miller can't say this. But since Peyton did, Von Miller can say this. Sports are weird like that. Also, what is "heada$$"?
There's also this Vine floating around where Miller throws Kelce to the ground ... after the play is over.
Seriously, watch it and you see the play ends and then Miller drops to swing Kelce. This of course came after Miller's highly questionable personal foul on Alex Smith when play was stopped.
There is some history here. Von Miller took a cheap shot on Alex Smith last year and as he was being penalized for it Kelce made his feelings known as cameras caught this gesture:
Travis Kelce telling Von Miller what he really thought of that hit https://t.co/dxtDRXatBJ— Brawley Darbon (@brawleydarbon) December 1, 2014
Kelce had a tweet (that was later deleted) that made, ahem, a reference about Miller.