<a class="link" rel="nofollow" target="_blank" href="http://www.popsugar.com/celebrity/Jack-Black-Rides-Mechanical-Bull-Ellen-DeGeneres-Show-37390370"></a><p>Jack Black</a> 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 Ne
