I ran out of books by Lawrence Watt-Evans to read to Sebastian (until he publishes more), so I started reading him the Taltos (aka Jhereg) series by Steven Brust. He's enjoying it a lot. Tonight as I was reading, a new male character with a high voice came in to the story. I may have made his voice a trifle too high, because I suddenly realized that I was sounding rather "Muppety", as I remarked. Sebastian agreed.
I must say that the word "Muppety" really amused me. As far as I know, I've never heard it before. So I guess I coined it.
Anyway, the voice kept getting higher and Muppety-er, and suddenly I burst out with "Super-Grover!".
We both cracked up.