I just love their 'See a hole, stick your hand in it' attitude -- I can relate.
Otters React To Anti-Gravity Water Drop Illusion Machine

Because this is why the internet was invented (“It’s true.” — Al Gore), here’s a video of pet otters Kotaro and Hana (previously) reacting to a machine that makes water drops appear to drip backwards. I think it’s safe to say their little minds were blown. Honestly, my big mind was blown too. Big in size, not in power — not that you ever need reminding.