If you’re Facebook founder Mark Zuckerberg you pick Bill Gates.

“Yesterday, Governor Chris Christie challenged me to do the ALS Ice Bucket Challenge. I accepted his challenge, and now I’m challenging Bill Gates, Sheryl Sandberg and Reed Hastings next,” the 30-year-old multi-billionaire said.

“You guys have 24 hours to complete the challenge or you have to donate to the ALS foundation — or both.”

The Ice Bucket Challenge involves nominees pouring a large vessel filled with freezing water over their head.

Watch the video below.

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