A few things here.

funny how no one's mentioned that "Steve" was played by the guy who was the principal in Breakfast Club, Paul Gleason, may he rest in peace.

Oh good!
The episode containing the scene that makes me laugh the second-hardest (after Jimmy's book reading) is coming up later this summer: Security Door. Specifically, the scene where Dave gives his presentation on the use of the security door, including coverage of potential scenarios that only Matthew would think…

I panicked!
Bill sucker-punching Steve is one of the greater physical gags in the show's run. Hartman's reaction is so remarkably fast. Even though I know it's coming, and am in fact eagerly anticipating it, it still catches me off guard every time.