That was me, all alone up in the far parking lot at the State Fair grounds, finger pinned between the sprocket and frame on the skid steer, and going "Oh Siht!". I got it out, wrapped it in gauze and sat there for 10 or 15 minutes while I watched bleeding and accessed the situation. Stopped bleeding, check. Call boss, check. Pick up tools and head for shop, check. Go to Urgent Care and get fixed, check! 8 stitches and a week off later, it still hurts some.