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Jack in the Box glitch Exposition

The left box will teleport its green lid to the left of the bricks, and then above the bricks, before returning to normal. The box in the middle is unblocked, but freaks out if you fast forward and wait for the lid to slowly recoil enough to touch the clown face. If you fast forward long enough the third highlighted box will teleport its lid up and right, and then the clown face will emerge from the bottom of the box.