This is written at a time when I shouldn't. There are at least a dozen other things to do; including picture-taking. But where to start?
It's a bit like cats that will, in situations where they don't really know what comes next, start licking themselves. Or birds pecking randomly at the ground while uncertain whether to stay or flee.
According to Wikipedia, a prime example from humans is head-scratching. Surprised they don't mention blogging.
"Displacement activity", they call it.