not the worst.. but probably the funniest and only happened a few days ago. I was tuning up my main mtb (a franken SS that I put too much time into always) and apparently I forgot to actually close the QR skewer, anyhow I rode it for about 5 feet before I tried to do a bunny hop to see just how much I had lightened it... needless to say my front wheel took off without me, I managed to land on my feet and hold the bike, but it was definitely humbling.