Tibshiranis complete ALS Ice Bucket Challenge: Update

Sangwon Hyun, a Statistics PhD student at Carnegie Mellon University, challenged Drs. Tibshirani (both of them, with Ryan's consent) to the ALS Ice Bucket Challenge,  the phenomenon that's spreading ALS awareness across the country. See how they held up, and who was challenged in return!

UPDATE: Trevor Hastie stepped up to his challenge(s) with grace and style: watch the result here.