The 20 most memorable moments on 'How I Met Your Mother'

After nine seasons of running gags, touching scenes, flashbacks and flash-forwards, the series finale of "How I Met Your Mother" airs on March 31. So we couldn't possibly name only 20 most memorable moments from the show, could we? Challenge accepted!

After nine seasons of running gags, touching scenes, flashbacks and flash-forwards, the series finale of "How I Met Your Mother" airs on March 31. So we couldn't possibly name only 20 most memorable moments from the show, could we? Challenge accepted!