Train of thought
@AzulCrescent It's also a train of thought because of the carriages that lead into eachother! One thought leads to the next and so on
@lenarena @AzulCrescent
This is how I've always imagined it, and if one link gets interrupted, you lose the whole rest of the train!
@AzulCrescent It's one of the most apt English phrases! You illustrated it really well, too 
@AzulCrescent Looking at the reliability of train services here, I find the expression a perfect fit, too.

@AzulCrescent In French, we say “fil des pensées” (thread of thoughts).

It’s nice to see mini-Azul again! ^^