This seems to be a recurring MTB problem I put up with as just 'one of those things', yet it has occurred to me that maybe I'm the only one affected by this affliction... 
Every once in a while I seem to completely trash an innertube, generally in dry dusty conditions, as heavy braking - particularly on the front - seems to cause the tyre to rotate round the rim slightly, taking the innertube with it and eventually severing the valve.
This can be quite exciting at times, as the front tyre will have a propensity to go off with a bang and a whooosh, just at a critical point while pinning it through fast rocky tech sections. I like to think that events like this help keep me razor sharp and rad.
I expect that it won't be too long before someone comes along with a helpful comment like 'Tubeless!' or something like that, but I was hoping that maybe there's been something I've been missing in my conventional tubed setup all along that would overcome such issues. Velcro, maybe? Or carpet grip?
Perhaps I just need to brake less and be less sick generally.
