I saw Steppenwolf at The Grande Ballroom in 1968 and the drummer was so high he fell backwards off his stool. As he fell he was still swinging his sticks.
Saw Hendrix in '68 at, I'm pretty sure, Detroit's Masonic Auditorium. His amps kept picking up a talk show from a local AM station, WJR. I thought it was part of the show.