Jack Black showed off many of his impressive talents when he stopped by The Ellen DeGeneres Show on Friday. While discussing his upcoming movie The D Train, Jack told Ellen that he had to learn how to ride a mechanical bull for his role as the head of a high school reunion committee. Jack admitted that he mastered the skill in no time, which prompted Ellen to challenge him to ride a mechanical bull for 45 seconds. For every five seconds he stayed on the bull, Ellen donated $1,000 to Doctors Without Borders working to aid Nepal earthquake victims. Watch the video above to see how long Jack stayed on the bull, then check out Ellen's latest prank on the Today show's Matt Lauer.
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