It was a running joke in practice started by Fein that carried over to the games. The climax of it being the 11 sack performance against State.
At first it was pretty funny, and still is when the players do it, but I promise you it will be run severely into the ground by us fans. Although, the more annoying it is to your opponent, the more fun it is to do.
Basically, the front 7 are landsharks that eat qb's alive.