They're a little late on dance crazes in Pittsburgh.
You caught a foul ball. You know the camera's on you. This is your moment. What do you do? If you are this Pirates fan, you do the Terrio dance:
The internet is at least two Vine dance crazes past Lil Terrio, but Pirates bro saw all those football players doing the "Kill 'em" dance in 2013 and committed to that plan when it was his time to shine.