I think we all need to start carrying a knife with a serrated edge that will cut metal. To hell with ruining the sails or rigging it your going to die!!
That is indeed true. Sometimes we want to keep our gear undamaged for too long. Something I learned from former marines/commando's (we seem to have quite a few of them in cat sailing overhere). Din't panic, Don't freeze-up; don't think about later, do immediately what you think will work. If it doesn't work then you still have some time to think up something else and do that. All gear can be replaced; it is just money, no big deal. That and to remember to always bring a proper knife with you.
In cases like this cutting the trampoline can do wonders can do wonders if somebody is trapped underneath. If the rescue-ee is hold down deeper then have one person do buddy breathing with that person while the others do the cutting and stuff.
Actually I'm quite happy I took that diving course once. Both made me feel even more relaxed under water (don't panic) and taught me some tricks on how to keep somebody alive. Often if you relax yourself untangling becomes alot easier. Thats another taught in diving school.
Wouter