Fuel was a little lower than I usually let it go (under a 1/4), so that could very well be it.Fuel pump is my bet, low on fuel, old pump is hot because of its age, cool fuel hits it when you gas up and pump locks tight, just a guess only because I grab vehicles all the time at the petrol stops.
Sometimes you can have someone turn key to start while you bang on the tank and it will start, they do it at the shop all the time.
I will definitely be banging on the tank before I decide to drop it! Lol