This story has gotten a small amount of attention in the press — and, come to think of it, that's about all it's worth…
The Australian grunge band The Vines was doing a sound check in advance of a scheduled appearance on "The Tonight Show" with Jay Leno shortly before the taping was to begin. When things did not go well, the band's lead singer, Craig Nicholls, apparently went crazy, knocking things over and wrecking equipment. When Leno heard, he cancelled their appearance on the show immediately, reports the New York Post, citing a report in the Los Angeles Times. [link to full report]
What my Compulsion To Add Trivia To Everything can't resist noting is that a similar situation occurred around 1969, back when Johnny Carson was hosting The Tonight Show. A rock group called The Youngbloods had been booked, almost as an experiment to see if acts of that sort could draw in younger viewers. (One book on Carson ascribes this incident to The Young Rascals, which was a completely different group. But the best sources say it was The Youngbloods.)
During sound check, the story goes, the performers became abusive towards Johnny's musical director and booth director. Carson caught a little of the proceedings on the monitor in his office, marched down to the stage and told the group, "Wipe your noses and go home." I'm not sure if the reference to their noses was because they were acting like babies or ingesting drugs. Either way, that group never appeared and the industry buzz about the incident did much to make what probably would have been a brief career anyway even briefer.
It was a long time before another rock act graced Johnny's stage. When one finally did, it was very well behaved.