This mash-up of the classic Dr. Wily stage theme from Capcom's Mega Man 2 for the Nintendo Entertainment System and Elton John's classic "I Don't Want To Go On With You Like That" from Reg Strikes Back is one of the best things I've ever seen on the Internet.  Yes, even better than the Castlevania / Rockwell combination of "Vampire Killer" and "Somebody's Watching Me".  I've played a lot of Mega Man 2 over the years and never found the Elton John power-up or faced the pianist's Robot Master alter ego, Rocket Man.  It just goes to show there's always something new to discover in our favorite games.

(via Kotaku, and yes I know there's not an Elton John power-up)