Banana Doubter?

My friend likes to occasionally talk in his sleep.

I am an easily amused individual most days and or nights.  So upon noticing him giggling every time the chair I was sleeping in made a sound, I had to investigate further.

After 15 minutes or so of investigative, scientific testing it seemed that a slight squeaking sound would prompt my friend into gentle giggling.  Naturally I had to up the ante and when I shifted loudly in my chair, he abruptly said "Banana Power."

Almost immediately I thought he said 'Banana Doubter' and proceeded to visualize this:

A stereotypical "doubter"

I'm not either...