So what really goes on at the bottom of all those NFL piles?
"It gets pretty crazy," Vikings receiver Jarius Wright said. "It's pretty much anything goes sometimes. A lot of grabbing of … everything."
Everything?
"Everything," Wright said. "It gets pretty intense."
The etiquette exhibited in those NFL piles is under scrutiny this week because of the actions of Bengals linebacker Vontaze Burfict during Sunday's 37-37 tie with Carolina.
The NFL fined Burfict $25,000 for twisting the ankles of quarterback Cam Newton and tight end Greg Olsen in separate pileups. Burfict, who will appeal the fine, reportedly was told he's also subject to the league's escalating fines system as a repeat offender if he has another similar incident.
"I saw the plays and you saw him twisting at their ankles, so I think it was the right call," Wright said. "You can't do that stuff. I can't say what the league should have done, whether it was fining or suspending him. But he definitely got some punishment, which is what he deserved."
Several Vikings players were asked how prevalent such behavior is at the bottom of NFL piles.