The ice bucket challenge, a viral phenomenon in which people dump cold water on their heads to raise money and awareness for ALS research, has been moving along steadily; Mark Zuckerberg, Microsoft CEO Satya Nadella, and Twitter CEO Dick Costolo have all participated. Next up: Apple Senior Vice President Phil Schiller, apparently spending some time on a lovely beach. As part of the challenge, those who take the plunge can challenge other people, and Schiller named Apple CEO Tim Cook, meaning we could see him involved soon, too.