Huge fan! I saw them I think in '91. I remember holding my spot against the stage despite the mosh pit's attempts to dislodge me.
I was the "singer" in a very cool band in high school (I sucked, the other guys were pretty incredible musicians) that was very Primus (as well as Mr. Bungle and Chili Peppers) influenced.
On a beer related note, Primus is one of the better mass-produced Belgian lagers.