To be in conversation, then to space out on some mental rabbit trail once the topic is
done being discussed and bring up a
random topic that is the result of
said rabbit trail.
Friend 1: "And that's on the color
blue."
Friend 2 (thinking):
blue...sky...clouds...cotton candy...sugar..."Sugar, Sugar" by the Archies...
Friend 2 (singing): "Sugar, sugar... aw,
honey, honey..."
Friend 1: "What made you think of that?"
Friend 2: "OH haha sorry I totally smoranged"