Nearly all of the halibut I get from the tube seem to be calm and then all of the sudden go nuts. I've had several fish bust off because I wasn't ready for the "panic" attacks. I've never popped my float tube but have heard of it happening. I did pop an inner tube while float fishing down a stream in Virginia trying to get the hook out of a largemouth (it's dorsal popped the tube). My sister couldn't stop laughing as I suddenly dissapeared.
Pete
You can't catch tomorrow what you kill today - please practice catch and release.