McLaren Mercedes team members dump buckets of ice water onto Formula One driver Lewis Hamilton of Britain as he takes part in the “Ice Bucket Challenge” after the first practice session at the Belgian F1 Grand Prix in Spa-Francorchamps

McLaren Mercedes team members dump buckets of ice water onto Formula One driver Lewis Hamilton of Britain as he takes part in the “Ice Bucket Challenge” after the first practice session at the Belgian F1 Grand Prix in Spa-Francorchamps

McLaren Mercedes team members dump buckets of ice water onto Formula One driver Lewis Hamilton of Britain as he takes part in the “Ice Bucket Challenge” after the first practice session at the Belgian F1 Grand Prix in Spa-Francorchamps August 22, 2014. REUTERS/Stringer (BELGIUM – Tags: SPORT MOTORSPORT F1 TPX IMAGES OF THE DAY) BELGIUM OUT. NO COMMERCIAL OR EDITORIAL SALES IN BELGIUM