CRASH: "We've Got Hostiles"

The game crashes consistently as I exit the elevator and turn to continue. MDMP included. Any suggestions?
hl2_4104_crash_2012_9_17T19_25_4C0.mdmp (105 KB)

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.