[apocolyps6]

If I remember correctly, in my diver training we were instructed if someone was in need of saving to grab them from the back by the hair and drag them behind you to safety. That way there is minimal chance of the person freaking out and dealing you any damage.

[lamontcg]

Grab them by the tank valve on their back and hook your knees around their tank and ride them like a bucking bronco. You still need to be ready to get away from them if they don't calm down. And that assumes you're able to get behind them in the first place.