once helped the friend of a friend push his motorcycle up steps from outside, in to their first floor apartment in a 2-story 4-plex.
guy said he was just going to store the bike inside for a couple days since he didn't want it getting stolen or some ****. anyways, he wound up keeping the bike in their living area for weeks, wrenching on the thing and periodically starting it up to test out his tinkering.
guy would fire it up and rev the thing repeatedly. in their living room. he did it once when i was over. that's a loud i don't ever want to experience again in my lifetime.