Actually, to be serious for a moment, the last poster has it. I once saw a safety vid of various American pilots who had crashed and burned. The guys with sleeves rolled up, collars turned down etc often lost the use of hands and were very seriously injured. The Yank gloves melt on and the fibres play havoc with the complexion.
The moral of the day was you can expect to lose any exposed flesh. Even though it's tempting to 'go comfy' on a hot summer's day, murphy states that's the day the bowser you're refuelling from goes up. Most of the case studies were from the 60's and 70's but it can and does still occur.
The difference between the protection offered by nomex suit and proper garbing and the cotton t shirt approach was soberingly vast.