I could have sworn Valve leaked their own source so they could buy more time to make the game. I new some guys who compiled the source and played it and that scene where he blocked the door with the chest and the AI got all smart. Well, valve said that they had just made really smart AI's, however, the people who I talked to (who played that) said that it didn't matter what you did, the AI did the same thing.

Sorry, just me sniffing the air for fish...