One of Ken Kesey's Merry Pranksters was a faculty member at Evergreen during the early years. I personally never attended any of his lectures, but according to TESC folklore this teacher frequently spaced out in the middle of his classroom presentations as if he was falling into a trance. Then one of the students would yell, "Too much acid, man!" and the instructor snapped out of the flashback with a jolt. TESC faculty are on contracts rather than tenure-track, and I believe this faculty member was not invited to have his contract renewed.
Kesey himself came to campus to visit once or twice. In the 1980s I had a chance to talk with Kesey at a conference, and he told me he always thought of Evergreen as "The school without chairs." Initially he was talking about furniture, but since the school didn't have traditional academic departments with department chairs, maybe he was giving me a double meaning.