After making a few stops or working 16 hrs. Hop on the bike, idle it for a few seconds and take off. Make it about a mile and it quits. Left the damn pepcock closed.
Or start it up to warm up. Get all gear on, stand bike up, forgot the fork lock turn it off to unlock it.
Or on the old bike, I sometimes go to pull out and fell a scraping. Left the kickstand down.
On the rare occasion forgetting to strap the chin strap. Odd feeling.