Well Art Tripp, the drummer, was a rather talented chap up - from Wikipedia:
In 1962, Tripp enrolled at the Cincinnati College Conservatory of Music to study percussion. His private teacher at the conservatory, Ed Weubold, was a percussionist with the Cincinnati Symphony Orchestra (CSO). Tripp became a regular member of the CSO, performing with artists such as Igor Stravinsky, Isaac Stern, Leonard Rose, Jose Iturbi, Loren Hollender and Arthur Fiedler. In 1966, the US State Department sent the orchestra on a 10-week world tour, which provided additional experience for the young musician. During this time, Tripp also played two seasons as timpanist with the Dayton Philharmonic Orchestra, as well as a season with both the Cincinnati Summer Opera and the Cincinnati Pops Orchestra. He was selected by avant garde composer John Cage to work with him in performances and workshops when Cage became composer-in-residence at the Conservatory of Music.
Tripp graduated in 1966 with a Bachelor of Music degree and in 1967, accepted a scholarship to the Manhattan School of Music in New York, primarily in order to finish a Master of Music degree, but also to expose himself further to contemporary music. His teacher was a former timpanist with the Philadelphia Orchestra, Fred Hinger. Hinger was at that time performing with the Metropolitan Opera Orchestra as well as teaching there.
Then he met Zappa, and ended up wearing ladies' underpants on his head. You've got to admire the career progression.