I wonder what would have happened if the passenger on the wrong plane would have had luggage? Do they match the number of suitcases with what the passengers on the plane have checked in? Is it btw possible here that if I spend too much time in the lounge for instance, that my suitcases fly if I'm late from the plance (checked in but missed boarding?)

The passenger wanted to go to Montreal, instead of Toronto where the plane he was on was going.