I don't act but i think i've done extra work twice a Jackie Chan film (actually the worst Jackie chan film) and that hidious remake of The Honeymooners.
Yeah its pretty shit - all day hanging about for 10mins of work - i imagine it a lot worse with a tone of make up on too.
Thats being said watching Jackie Chan in action was amazing though I did cry a little when they attached the wires to him. Samo Hung was the fight choreographer, so he was there too.
On a side note stunt man Bradley Allan got KTFO when a boom cam hit him in the head and he was brought to hospital..
Also on the plus side the food isn't too bad.