APPARENTLY this is a very common creature. A house centipede. Fast, yes. Smart, no. It scuttled the perimeter of our bathroom three times before experiencing deja vu and finally exiting for pastures new. Perhaps it thinks it's a fish.
This one is also quite common in our garden. I believe it's a southern green stink bug. In any case it seemed to be smarter than the centipede. It strolled all the way across the top of our garden bench, down one leg and across the patio to the other end of the bench again. It had only gone a few centimetres up the bench leg when it recognised its earlier path and turned around to go somewhere new. Perhaps I'll call him Tom-Tom.