When I learnt to white water raft they taught us that when you get hold of a rescue line, roll on your back so that you paravane up not down. When I was getting pulled out after grabbing hold of the rescue line from the bank, the last words I heard were on your f?@#$^& back gurgle, when I came back up after rolling on my back, they were still swearing I nearly pulled them all in with the water pressure on my front but they were able to retrieve me on my back.