While the song about the painter blowing yo his loo due to over use of cleaning fluid by his wife, may be urban legend by now, there was one case reported in the USAF Safety News back in the mid 70's, of a similar nature, and supposed to be true. Of course with no Internet, urban legends were much harder to debunk,

Seems his wife was in the habit of clearing the spray nozzle of her can of hair spray by inverting it and spraying it into the loo. Hubby followed her into the bathroom, lit a cigarette, tossed the match into the loo, and the rest is history.

Dave, who used to be a Safety Technician for the USAF.