One handed rescue knot, hold the rope thrown to you while in the water in the left hand, around behind your body, maintaining a grip on the bitter with the right hand, over the rope between body and left hand, back up close to chest,back out to left hand, under the rope with the biter end (tricky part) and grab over the top, pull your hand back through the loop around your right hand, there it is you have tied yourself off with a bowline. I wish my descriptions were better.