I'm going to suggest reserving judgement until the facts are on the record. Assault in is broadly defined in Canada. Unwanted physical contact can be assault (ie: pushing, punching, kicking, biting etc.) but so is simply raising your hand like you are intending to slap someone in a threatening manner or grabbing something out of someone's hand. Further, intent can be transferred. For example: a drunk patron at a bar takes a swing at the guy who spilled his drink on him only to miss and hit his own girlfriend.