Yer, I had something nasty horrible to me, not gory though. I didn't use to wear a helmet then I fell of because as I pedul hopped out of something my finger sliped off the lever and I went strate back on my head. My vision went blurry really bad, i went to hospital to check I wasn't in delayed concusion. So now I suggest you wear a helmet people ps. my rear wheel got the corner of the wall so it through me back faster ~Matty