Hm

Basketball in a non contact sport, if he'd cleanly knocked the ball without falling into blondie it would have been alright but his momentum drove him into the back of the shooter causing a foul

If I'm remembering like High school PE correctly

Ohh, thanks!! this really shows how I dont pay attention to my class

Also unlike other sports manga none of the rules are explained in this one at all which I think could have been handy