Cycling: Front QR on my Cannondale wasn't tightened properly. Was doing about 15mph when I jumped off a curb, while commuting to work one morning and the tire came out of the fork. My face hit the handlebar, and then I fell over and came to a stop using the left side of my face as a brake.
Results: 3 stiches across my nose, six in my lip. A chipped tooth, road rash all up the left side of my face/neck, and dealing with a swollen shut eye for a day and a half.
Worst part was having a work buddy not believe me when I called in sick due to a "bicycle wreck". Funny what a picture text message can do to change someones mind.