same thing happend to me yesterday... i had a little obstacal course at this spot....hop up a curb then 7 feet later bunyy how a gap....so i put my bag there (in the gap) first try goes good...then second trty i didnt have enough spped but i did it anyway...wen i landed i slipped off my pedals i rolled my right ankle smashed my nuts and my pedal slashed the back of my leg,....and i was like wow