I'm pretty sure it's The Freak Remix
I've heard both The Mystery Remix and Mac Zimms Remix, and it's neither of them.
My earlier thread:
"Not only a The Freak remix of this classic, but only a banging remix of The Mystery and Mac Zimms himself...."
Also listen to these two samples: (click them to download)
Mac Zimms Remix
The Mystery Remix
Also visit http://www.okmarkt.cz/?lang=en and search for "Zimms"
Most wanted bootlegs:
Above & Beyond pres. Unkle Petter - So Many Faces
Armin vs. Angelic - Rebirth Of Angelic
Oakenfold - Southern Sun (DJ TiŽsto "Dutch" Remix)
Armin van Buuren vs. Laura Jansen - Coming Home vs. Use Somebody (AvB Mashup)
Just because Deadmau5 has no class, you don't have to associate Tijs with him.