Unlike your recently hilarious and 'twice posted' (presumably as you found it so funny) reply concerning the surname of Caster Semenya... truly inspired...
With motorsport, it's something started by American driver Dan Gurney, who sprayed his champagne to celebrate his win in the Le Mans 24 hours in 1967 and this caught on thereafter.
I don't know what your problem is dancairo but you are definately an olympic standard tw&t. Waste of a question? why? Are we limited to how many questions we can ask? Perhaps you can tell me why it is some how invalid. What a fcuking d1ckhead!