Bullet in the head *spoilers*
At the end of the film, Hau gets shot in the head but then still has enough life left in him to discover Yan's transmitter. Now I'll be the first to admit that I'm not entirely educated on this type of thing, and pretty much everything I know I've learned from movies (sad, I know), but is it possible to be shot in the head and not be killed instantly?
"I grew up watching TV and I turned out TV." - Homer Simpson