Erm...what happened during the 2008 British GP?
Downpour before the race and starting on intermediates.
Track drying, at first pit stop several top drivers decided to keep on the worn inters rather than a new set.
Shortly after that - rain set in.
Barrichello towards the end switched to full wets and was ridiculously faster than everyone else on the circuit.
Massa unable to keep it on the tarmac - five spins iirc.
Hamilton winning by well over a minute
Barrichello on the podium in one of the worst F1 cars ever made.