That was a bug that hit a lot of people at that point in the game, and was fixed a couple of months back; either you're running an old version, or they've reintroduced it! One option is to turn the detail down to the lowest level until you're past that guy in the corridor, as it seems to be something to do with the dead civilian models. Another is to keep looking at the ceiling or wall as you pass so they're not rendered.

Go to the steam site and reload the game, it should fix the problem.

You may want to have Steam running and have it update the game so if you ever replay you wont have to worry. I never had any of those problems since I always have Steam on and updating.

In the future, you'll probably want to take your questions about Valve or other Steam games to the forums at steampowered.com. It's a popular place and they're very used to these sorts of problems and can help you better than anyone here can. In all likelihood, your question is already there with a solution.

Hey there Ppl!
Hey have any of you guys experienced the problem of a character in the game crashing? I've had this problem while playing in Episode 2! Say for example, when you are going to retrieve the Larval Extract with the vortigaunt. At the time you have to get into an elevator and he uses one on the left side while fighting ant lions and zombies. Once his elevator gets to the top he just stays there and doesnt move. I had to resume gameplay from the last save point and it worked.

But then again the problem showed up when I got to White Forest base. Once I get into the room where Eli is working. Once the cheap chat is over and he heads towards the gate opening control and says "It seems like they're compiting for grant money" he freezes and does not move anymore. Its not the first time that I play the game, ive finished it before and experienced the same issue. Just had to resume from the last save spot but now that i do it, it does not work anymore. Any ideas ? Please I'd like to hear them !