I know he sometimes passes out after his concerts because he exerts himself a lot. The man doesn't sleep much (3-4 hours) and he doesn't eat much carbs at all (he says he gets fat eating carbs) so his energy is eaten up really fast.
Makes sense for him to hit his head and pass out though. Josh is how tall? 6'3'' I think. and for Gackt to be on his shoulders and then fall straight to the floor. Thats a pretty hard hit to the head o.O
Even the Bunraku staff have been talking about how Gackt barely sleeps and is always so busy, either filming the movie or doing more work on his upcoming cd.
I'm really excited to see this movie though. I never would have imagined Josh and Gackt together. I loved Josh in Pearl Harbor
lol