Beefheart like Zappa didn't condone drugs. The incident you are talking about was at Monterey Pop Festival. The Good Captain tripped and fell backwards of stage prior to the set starting and was so embarraced he couldn't face the (huge in those days) audience. Ry Cooder was never an actual band member. He was called in by the record company to finish production of "Safe As Milk" on which he added his own Guitar, Bass and even some drums to the final mix.He was playing with the band on that occasion and always maintained that that would have been CBs big break if he had managed to overcome his nerves and play. To say that he was "So stoned" and RC left because of that is very unfair to a person that I hold in high regard and who stayed true to his music and art throughout his life without selling out as he could easily have done in the late sixties. Farewell Captain!