I don't know. I think I'd rather have my head crushed "instantly" by a 600 pound block than asphyxiate over several minutes breathing in hot ash.
Cooling Off Hotseattle: http://content.time.com/time/magazine/article/0,9171,31486,0...
Mr. Famous Comes Home: https://www.forbes.com/asap/1997/1201/144.html