I have noticed that in the NBA (Nearly Basketball Assn.), the officials are very expressive with their foul signals. I don't mean they're too demonstrative - I mean they give signals that indicate the behavior of the player who fouled. I've seen Dick Bavetta often give a signal that looks like he's grabbing his wrist and raising his elbow above his shoulder to indicate the defender moved his elbow into the offensive player on a block.
Is there an official signal chart for the NBA? I haven't seen it on their website.
BTW - I guess there's an official NFL signal for "givin' him the business".