Excessively swinging of arms or elbows, violation question?

[jritchie]

if A1's shot is in flight, A2 swings elbow's excessively and you have a violation, how come we don't count the shot if it goes? is it because it's a violation on the offense, same as a travel, dd, etc..no matter if the shot was already on it's way.... Am i interpreting the rule correctly???