When Tony Levin was taken ill on the ABWH/Yes tour, Jeff Berlin stepped in with less than a weeks notice and took his place, playing a two and half set of Yes and related music. From interview at http://www.nfte.org/interviews/berlin_interview.html "I wrote them [the charts] out on Sunday and Monday night. Wednesday we were rehearsing and Thursday I was on the gig. Now if I didn't have the background and experience I probably would never have been able to do a Yes show in two days"
Any advance on two days?