The singing co-pilot

And there I was, flying the new Manfred's C47_mk3, leveled out at about 5000ft, trimmed and on the level. No particular destination or direction.
I've got the C47'S manual open on a another monitor, studying line for line, getting to grips with the VC and all else. There is just the steady drone of engines as we fly.
Co-pilot is activated, intercom switch is on. (He has, after all, helped me off the runway.)
Then, after a considerable period of just droning, he starts making light chat! And then he sings me a song
A song about a co-pilot with frozen pitot tubes?
What an absolute delightful surprise that was
I wonder if anybody else have experienced this? What is the song?
Very nice touch..
Jan
I've got the C47'S manual open on a another monitor, studying line for line, getting to grips with the VC and all else. There is just the steady drone of engines as we fly.
Co-pilot is activated, intercom switch is on. (He has, after all, helped me off the runway.)
Then, after a considerable period of just droning, he starts making light chat! And then he sings me a song

A song about a co-pilot with frozen pitot tubes?
What an absolute delightful surprise that was

I wonder if anybody else have experienced this? What is the song?
Very nice touch..

Jan