"Scout" wrote in
:

I got to see the Bertie the Bunyip show in Philadelphia when I was a
kid. As it turned out, Bertie was never his friendly or chatty self
until some strange man shoved his big hairy arm up Bertie's ass. The
kids were traumatized by the scene, but I remember how Bertie's
perpetual smile stretched from one long floppy ear to the other.
Scout

I have no doubt that that is exactly the way you remember it.

Bertie