What's your pet's most inexplicable ritual?

Sol (bearded dragon, 2 years old) stares at the same corner of the wall every Tuesday. Not Monday. Not Wednesday. Tuesday, 4pm, that exact corner. He's done this for eight months.

Biscuit (greyhound) stands in the kitchen and stares at the refrigerator at 2:47am approximately twice a week. He's not hungry. He just has thoughts about the refrigerator.

I want to hear yours. I want to know what we're all living with.