There was a puzzle question: a little pig is about to be shot by an arrow. You’re told to move only two lines so the pig can avoid being hit. I tried thinking about it for ages but couldn’t figure it out, so I gave up.

The solution is to change your perspective. At first, we’re looking at the pig from a normal side view on a flat plane. But instead, you’re supposed to view the drawing from above — a top-down perspective — and then move the four leg lines so that two legs are on the lower side and two legs are on the upper side.

When you see it that way, it looks like the pig has spread all four legs out and flattened itself against the ground, so the arrow can pass over it without hitting the pig.