Interesting experiment on Myth Busters regarding mobile phones and fires at petrol stations.
Turns out that, in the States, you very often pay up front for your petrol. Then you click the nozzle so you don't have to keep holding it, unlike in the UK.
People then go and sit in their (nylon fabric) car seats in their (artificial fabric) clothes and use their phones while the fuel is pumping.
If the tank has not enough space for the fuel pre-ordered, and the nozzle fails to shut off, then the excess fuel pours out onto the forecourt.
As it turns into vapour, the driver leaps out of their seat, and causes a spark because of the plastic fabrics and the ensuing static.
Since they are holding a mobile, the mobile phone gets the blame!
But the lesson for pilots is: natural clothing, stay alert and bonding!