Yes, during the match beetwen Toronto Raptors and LA Lakers a spectator (Lapo Elkan, a well-known italian manager because is family has the chief of the FIAT group and Ferrari; in 2006 he went to coma because he had an over-dose of cocain during a party with some transgenders) interrupted the match punching the ball...
look the video
http://www.youtube.com/watch?v=QpWpwTuQ1rI