The video below is quite impressive, showing a YouTube user playing and beating 4 Super Mario Bros games simultaneously including Super Mario Bros 2, 2J and 3!  Now, this isn’t exactly like it sounds as this is essentially a tool-assisted speed run through all of the games that takes advantage of using multiple emulators and save states.  Even though that is the case, the accomplishment is still pretty cool as it likely took a LOT of time to put this together.  Just a word of warning before you watch this awesome video, you get audio from all 4 games so you will either find it really cool or it will drive you crazy, either way, you have been warned!

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