Yes, think I remember seeing that. I do definitely remember the cop (who I today learned was the guy who played “super dave osborn) give Liberace a speeding ticket for playing the piano too fast!
Ha, yep, found it:
https://www.youtube.com/watch?v=R2BdoPTGc64
Liberace, a natural ham and a good sport is able to pull off a comedy bit with no probs....and I remember Super Dave Osborn from back in the day on David Letterman lol.
Brings to mind this traffic cop sketch by Key & Peele:
https://www.youtube.com/watch?v=52br8-y0ONU