Has anyone ever attempted a self imposed challenge when playing a game?

[RCTjunkie]

1. Mario Kart Wii - 9999 VR points (any vehicle), 3 star ranking with all karts, beat all fast staff ghost, all while using the Wii Wheel.
2. Super Mario 64 - All 120 stars as fast as I can (Did it in 6 hours)
3. New Super Mario Brothers Wii - Never use the 1 button to run (I failed this one)