that's the beauty of it. You want to let your hands slip, but you can't. You want to do 20 instead of 21, but that's even harder. We want to walk back up the street, but something keeps pushing us. There is not enough time for another round, but there's still time. Every position your in is uncomfortable, so you hold it longer. Your hands rip, but your not torn from finishing. You can't breath, but your still moving. Shits' crazy, but it really isn't. It hurts so good.