
Continuity mistake: When Bill is cutting the crusts off a sandwich towards the end, he cuts two off, goes to remove the third, then the angle changes and he's now cutting it in half. After that we hear him sweep the crusts off the board and see him hand the sandwich to BB, then a shot or two later crusts are back on the board and he cleans them off again to make another sandwich. (01:29:05)
Answer: It's a piece of white lotus blossom. The wuxia film "Fist of the White Lotus" is the one where Pai Mei acquires his skills and power.
LorgSkyegon