Assuming we do indeed consider AIC grunge, BC is correct.
Also, I went to a Metallica show in '94 where AIC was supposed to be the biggest opener (it was sort of a mini-festival). However, AIC bailed on the tour.
At some point during Metallica's set, James said Jason had written a new song while he was naked in the dressing room and asked if we wanted to hear it. Then they mockingly played the intro to "Man in the Box." Even as an AIC fan, it was pretty funny.