Another new Irn Bru advert!
A guy is sitting on the toilet in a train... the one with the automatic slidey door. The door opens while he is sitting there, and he falls forward in an attempt to grab the door, with his ars* up in the air, exposed to the women in the doorway. There are a couple of funny quips I cant remember at the moment, and then a cyclist comes along and asks where he can park a bike! Need to see it again to catch the other stuff...