Assault in Canada does not require physical contact.
s. 265 of the criminal code states that a person commits assault when: ( he attempts or threatens, by an act or a gesture, to apply force to another person, if he has, or causes that other person to believe on reasonable grounds that he has, present ability to effect his purpose
He could also be charged with 267(a) assault with a weapon. If the Crown Prosecutor's office proceeds by indictment (instead of summarily), he would not be eligible for a conditional sentence under 742.1. If that charge were to result in a conviction, he could go to jail .
http://laws-lois.justice.gc.ca/eng/acts/C-46/section-265.html
http://stephenjackcriminallawyer.ca/assault-faqs/
^ random website that explains assault found with a quick google search... no idea who the lawyer is.