Indeed. Many moons ago, I helped out a youth orchestra based in West Sussex. The man behind it was the head of music in the County.
He was a cellist and could read anything put in front of him, faultlessly.
One day I was noodling on an upright bass and asked what I was playing. I just said I was just improvising something and he was completely stunned that I could do that. A weird situation in which each of us was in awe of the other.