This video clip is the world-record-smashing speed run for Super Mario Bros. (Mario All Stars version) by Nate Parkinson in 2007. Watch how he dies at 5:30 and still manages to beat the record:

I write about Nate's speed run in the introduction to Smartcuts. At the time, he was #1 in his category. The current world record for all versions of the game clocks in at under 5 minutes. It will put you on the edge of your seat. (Watch it here.)