The Ice Bucket Challenge has hit the tech world. In the past few days, Microsoft CEO Satya Nadella, Twitter CEO Dick Costolo, Apple CEO Tim Cook, and Facebook CEO Mark Zuckerberg have all dumped buckets of ice water on their heads. The latter challenged Bill Gates (you can’t complete the challenge without challenging three others) to dump a bucket of ice water on his head.

And look, Bill Gates dumped ice water on himself!

It’s a crazy contraption! Oh, Bill!

What do you think about all these million and billionaires dumping ice water on their heads? Isn’t is zany? Have you dumped ice water on your head? Was it cold? I bet it was.

Image via The Gates Notes, YouTube screenshot