I pout and/or get angry and pull away. I do try more now to say "What's wrong?" and get her to open up, but when she's like this, she doesn't WANT to open up, and so the cycle starts again.
We have to learn to find a way to allow the natural Martian and Venusian "rubber band" pulling away and snapping back, to actually SNAP BACK. Instead, ours pulls away and pulls away and eventually breaks.
And each time this happens (and there have been four or five distinct crises), it takes a major toll on the marital relationship, much as a massive stroke takes its toll on the brain.