Oh, that's the stuff they TEACH. I've seen what they DO here in NYC - suffice it to say that they don't particularly care for how much your paint is scratched. Most of these techniques are intended to minimize damage/repair costs - the through-lock techniques are a good example.
Forget the DOOR - you take out a WALL if you need to get in, and there's very little a saw and a hydraulic cutter/ram can't defeat.
This little gem is a - literal - lifesaver: http://www.botachtactical.com/hurato.html