@Sabriel: Cats are the original parkour... ists?
@badluckgirl can't log in: Are you going to see this guy on a regular basis for unavoidable reasons (he lives nearby or frequents your favorite restaurant)? I guess that would make diplomacy more important, but what's really important here is drawing a clear line that communicates your interest in not interacting again.
Since you said you don't want to be friends, I would take your message/statement/whatever further; don't leave the friendship option out there, because it's not an option for you. It might seem gentler, but it probably isn't productive. I'd say you're not interested in seeing him again and to please not contact you. If he calls/messages/whatever, you can ignore it (I'm inclined to make that immediate policy, but some would differ, I suppose).
@UnpleasantBug : Oh god, they're all so horrifying, I can't just choose one. Fake-mustache-and-aviators mom-to-be? Weird STOP sign pillow wielders? Fetus eater dad (who's wearing what looks like a hairy french toast hat, whaaaat)? Maybe it's time for humanity to leave this planet in peace.
@Steggy stole your ice cream: "Also, the guy can't even use a screwdriver, I don't know why he thinks he can fix a hoover."
Sounds as though he might be a partially-self-inflicted victim of the delusion that maleness confers the ability to fix things and be "handy".
Seems that you and flatmate #2 have the right idea.