The ALS Ice Bucket Challenge that is presently sweeping the US has reached hip hop mogul Dr. Dre, courtesy of a challenge from his new employer, Apple CEO Tim Cook. When Cook took a reasonably sized bucket of ice over the head last week, he nominated Dre as one of the three people he wished to see either doing the same or donating $100 to the fight against ALS, better known as Lou Gehrigs disease. Being the larger than life persona that he is, Dres ice bucket is suitably oversized and delivered via a custom-built mechanism to ensure hes fully drenched.