Heres mine, pretty much nothing compared to some on here. It didnt hurt though.
I sprinted off from some lights(might of been racing a car) and my shoe unclipped from the pedal, i was doing about 25mph at the time, and slide on my arse/my arm doing that speed.
My sleeves were rolled up, and thats the only cuts i got

I did carry on riding to see my GF aswell, then rode back

Didnt slow me down much