Titus Fasenmyer
Titus Fasenmyer voted up Anonymous' answer

Having a thought train without tracks.

I do remember a nursery rhyme that might be related here ( or not.  Depending on the train)

"If all the world were apple pie and all the seas were ink,

if all the trees were bread and cheese,

What then, good boy, would we have to drink?"

Hop on the tracklesss thought train … Read more