Once, I was tasked to write an essay using exactly 100 words.  I simply started out typing away, without counting or keeping track of the words used, just hoping for the best.  I typed and typed and typed and typed and typed.  I wonder if I'm at word 50 yet.  Or maybe 54.  But I had no idea, having not checked yet.

Then – and this is all true – I did check.  My earlier guesses of 50 and 54 had been – yep! – exactly right.

Weird.

Then I thought some more.  "This is stupid.  I should do actual work instead," I decided.