You know what sucks? Concussions.
Allow me to elaborate. I keep my bike lock on my handlebars when I ride about. I've been doing that for years and its never given me any trouble, though I certainly realized it could in theory. Anyway, on my way to class this morning I take a tight ninety degree turn accompanied by a heavy tiled shifting of mass and my lock slips over the middle the handlebars, jamming them in place. Not realizing this, I simply tried to turn away from the large, oncoming pillar instead of braking suddenly as I should have. My attempt at turning away from this stack of bricks was unsuccessful and as my bike rammed violently into it. I was thrown forward and my head was slammed into the pillar with a good bit more force than I appreciated. I stumbled off my bike, straightened up and went to class. I've got quite the headache now and am getting a bit of vertigo and stumble a bit here and there, but I'm okay.
I knew there was a reason my momma always told me to wear a helmet. This made me reconsider my decision not to wear one ... but I'm probably just going to continue living life on the edge ... to the max!