On a kickoff one SC player stuck his arms out straight to the side as sort of an indicator that he wasn't going to field or advance it. It's not in the rule book but sort of a good sport thing to do. Apparently a different SC player fielded and returned the kick after his teammate signaled no return would be made and several Illinois players slowed down and left their lanes.

“There’s an unwritten philosophy in coaching that when you do this,” said Beliema, arms extended, in the postgame press conference, “as a college kickoff return guy, what you’re doing is you’re telling everybody else that it’s going to be a fair catch and it’s going to be dead in the end zone when the ball lands.”

Yahoo CFB enquirer podcast discussed this a bit and I found an article referencing it.

In the post game press conference Bielema said he wasn't taunting Beamer-he was taunting the whole team. Beamer complained in his press conference that Beamer was challenging his ethics lol