Can't remember where I read this (possibly Chuck Eddy in Stairway to Hell) or who it was originally in reference to, but the phrase "generates enough energy to keep a hospital running" always springs to mind when listening to Ray Philips on this Budgie track from 1972:
Same goes for Mick Tucker here
That's lousy sound quality but picked for the view of Mick right at the start. This is better
And finally Hugo Burnham, the man-machine.