I hate to ruin a perfectly funny story, but the part about the gasoline in the toilet bowl doesn't ring true. I seem to remember an episode of Myth Busters dealing with exactly that. I went to their website and this is what I found.
It is possible to ignite a pool of gasoline using only a cigarette.
partly plausible
A cigarette has the potential to light a pool of gasoline but just doesn't have enough sustained heat. Gas ignites between 500 °F and 540 °F, the cigarette at its hottest was between 450 °F and 500 °F but only when it was actually being smoked. An ignition is very improbable.
Now they are talking about a pool of gasoline being improbable to light with a cigerette, but a pool of gasoline mixed with toilet bowl water? Sorry but I can't buy into this one.