I think...baby Countdown's story was rather random?
I think he flew around in a rocket ship that was somehow made of sunlight pieces. I mean, it's ok that the sun is like a character & it can 'do' things, but even still, trying to figure out a rocket that was somehow made of solid light seemed over-the-top nonsense.
Weren't some of the big brother stories odd?
I like the idea of trying to find the most nonsense story of them all!
Other strangeness:
Rainbow babies put their ribbons on the ground and it flew up and turned into a rainbow
Trucker/4Speed made up a candy truck that could really drive (somehow)
I'm no back card expert though, there's got to be wierder ones...and I'd love to hear it.