Video: Robert Downey Jr. does the ice bucket challenge, then nominates Thor 5 years ago

Video: Robert Downey Jr. does the ice bucket challenge, then nominates Thor

Chris Hemsworth, time to step up.

Robert Downey Jr. is all over the ice bucket charity craze, and expects his Avengers co-star Chris Hemsworth - as well as fellow actor Vincent D'Onofrio - to comply within 24 hours or face the most dire of consequences.