@awnlee jawking
In real life, would that accomplish what I intended?
If someone could confirm or deny that based on experience, they'd either have to be a bit stupid to admit it on an open board, or have a detailed background in some form of spec-ops. Neither option would be forthcoming if they were smart.
It does have the Hollyweird ring to it though. As such, it's suspect.
Just from a science angle, the fire triangle of oxygen, fuel, and heat, would suggest it would start a fire if there was a spark, but the liquid petrol would have to disperse rapidly to allow a fuel air mix that would explode. Taking that line of thought further, theoretically, a dispersal device within the liquid, say a small can of compressed gas (hair spray for instance) that ruptured inside the petrol could do it.
Hollyweird is not a good example to emulate if you want realism.