Google 一下 "is hand part of the ball in basketball"

NBA 沒在判打手的啦
http://www.nba.com/features/misunde...les_051128.html

Incidental Contact: The mere fact that contact occurs does not mean a foul has been committed. Players are allowed to contact other players when reaching for a loose ball, or when performing normal offensive and defensive movements. The hand is considered “ part of the ball” when it is in contact with the ball and contact with a players hand when it is in contact with the ball is not a foul.

所以 在抄截, 蓋火鍋時 打到手掌都不算犯規.