Hahaha gold! 'switch up your routine every 15 seconds to 'keep those muscles guessin'
I do that, for example I'll do a "fake manouvre". Walk towards the squat rack, so now your body thinlks its gonna do legs, and at the last second I'll jump on the lat pulldown, and do a set there.
It really confuses the body. And other people at the gym.