I came across a YouTube site of Chico Marx playing the piano in various movies dating back to 1929 so I sat there and enjoyed myself for a while. If you care to enjoy yourself too, this is the URL:
https://www.youtube.com/watch?v=amQ63EZfUMA
At one point though, I noticed something. Look at this screen shot:
One of the piano keys was acting up. Now and then it would get stuck in its down position for a second or so here and a second or so there.
He literally never missed a beat. Chico kept the music coming with not the slightest hint of disruption, with total and complete control of the situation.
He really was a pro
