Youtube is full of people doing dumb things....a couple Darwin Award winners right there!
I regard that as a survival skill, say your bush plane has crashed and you need to kill an elk. Good to know about but to be done with care and only if there is no other alternative and never leave such a shell in your gun when it's not in use.
The other idea about solidifying the shot with melted candle wax: I was told it works by someone who should know such things but I have no idea if it would be effective in the great outdoors. The thing is, desperate situations call for desperate measures.