Ethel in time-out?

Ethel was sitting in the little space behind the open door to their pen, butt backed up to the wall. Still as a statue for some time. We don't really know why Ethel was doing that.

Self-imposed time-out?
Poor hide-and-seek player?

When she finally decided to move, she closed the door, staying on the outside.
We have resigned ourselves to just not ever being sure what goes on in her little brain cell.

Does your bunny or pet have any strange, inexplicable behaviors?