Unfortunately for me, when I was going down my body sort of fishtailed, putting my back in a C shape. I already have a little trouble with my back so it seized up in a big cramp. When I hit the water I couldn't move my back or the bottom part of my body. I swam with just my arms over to the rocks and did not give the ok sign (fist on helmet) because I was not ok. Eventually my back relaxed and I could carry on the rest of the way just fine. Today it's sore, but I think it'll be fine. I'd do it again.