Syd Barrett, Nick Mason and Roger Waters in the late '60s. Oh yea!
When Syd's brain fried in '68 David Gilmour stepped in and the Barrett era came to an end. Syd would be so whacked out on acid he would strum one cord the whole concert! His staring at the lights is what Waters used in the lyrics of "Shine On You Crazy Diamond" in 1975. ("Now there's a look in your eyes/ Like black holes in the sky")
Of all my concert going, Pink Floyd is the band I've seen the most!