damn, hope it heals up quickly!
i had a mate that was riding his bmx down a road one day.
the chain fell off, so he thought he'd just reach down and hook it back on as he kept riding.
but something happened and as he pedalled to hook it on, his finger got jammed in between the front sprocket and the chain.
it broke the tip/bone in his finger and ripped off whole the nail, and a heap of skin off.
that took 4 hours of microsurgery and over 100 stitches to fix.
there is another story of a guy cleaning his chain on a motorcycle (road bike),
he did it on a stand with the engine running and in gear, he caught his hand in there somehow, i think that took 3 or 4 fingers off