Having refuelled running motorbikes whilst sitting on them during enduro races involving nearly always a gush of fuel at the end cascading over the super hot exhaust and (air cooled) cylinder head I have always been impressed how resistant to ignition petrol is without a naked spark or flame.
Far more scary and likely is a pressurised jet of diesel on something super hot. Usually can only be the exhaust manifold as the water cooling on an engine keeps the block pretty cool.
Darwin Award on Twitter: "That went well. https://t.co/NI2AoDYMvM"
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