Before Twitter killed it off, Kevin Parry was a Vine star (who has since jumped ship to Instagram) known for his simplistic yet mind-blowing optical illusions. He’s since compiled a few of them into a longer video that will have you spending the rest of the day trying to figure out how he made each one.

We already know how the ball through the mirror trick was done, but for the staircase illusion we’re going to just assume that Parry lives in an M.C. Escher painting and the laws of physics don’t apply to his home.

[YouTube via Tastefully Offensive]