Doug took the challenge, and then challenged his dad.
http://www.omaha.com/creighton/blog/doug-mcdermott-challenges-greg-mcdermott-to-ice-bucket-challenge/article_070f18f8-2681-11e4-9ca4-001a4bcf6878.
EDIT: No surprise. His dad took the challenge hours later.
Greg's hat totally saved him from a lot of the water.