It's the opening tune from an old set on the Hyperreal archive.
Starts with some decent synths then drops into classic '92 breakbeat tune with a "dance muthaf*cka" sample. Think it's been pitched up so could be a mid-late 1991 tune.
Small real audio file at this link:
http://djsets.hyperreal.org/rm/19920000!MARS.rm
It's only 1.6MB but over the file limit for RM attachments.
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edit: found it: Ruff Rider - Dance Mutha