Yesterday I wrote a new piece of dialog where a secondary character spoke up on her own and made the exchange come to life.

Today I realized the ending of that dialog went off track because my MC would be too worried to respond as lightly as he does. So I started to redo the end of the dialog, but blanked out because a) I'm tired, and b) I need a stronger understanding of the scenes that happen right before it in order to have a grip on exactly how worried he is.

So instead of doing that, I wrote a couple paragraphs describing a pair of pants.