definitely one of my favorites was when they hosted MTV 120 minutes in 94
http://www.youtube.com/watch?v=Upo_q6sqfVQ
yauch as stewart wallace.
another great yauch moment imo was when they were on radio 1 in 97 (The breezeblock, DJ Set) just messin around doing freestyles and classic rap verses. only have that as an mp3 somewhere but if you haven't heard it i strongly advice you to check it out.