Refrain from tapping fuel nozzle after fill-up

I HAVE noticed some people tapping the nozzle of the petrol pump against the mouth of the fuel tank of their cars and motorcycles for that last drip of oil after they are done topping-up their petrol tanks.

This is highly unadvisable as doing so is especially dangerous to the petrol stations and the surrounding areas as tapping the nozzle against the mouth of the fuel tank could cause a spark and inadvertently ignite a flame.