Stupidly I left the props on while preparing a demo of one of my kk quads. The board malfunctioned while disarmed, props shattered and sliced most of the pad of my pinky finger right off. It took a trip to the hospital and 13 stitches to get it back on.   Finger 4 stitches in (Not for the faint of heart) PSA: ALWAYS REMOVE PROPS WHILE TESTING AND NEVER USE BROKEN PROPS