If you're crawling, and jump+place a path block beneath you, it will force you upwards. Also, if you have a piston below you with a path block on top, and you're crawling on top, when you activate the piston, you'll glitch into the block above. Also, if the player's top half of its hitbox is inside some blocks (roughly 40 block types, I tested nearly every non-solid block), and you place the path block in the lower half of the hitbox (at your feet), it'll put you into crawl mode or just "teleport" you on top of the path block. I don't have images, but this was the best I could explain. Also, the last thing I found was this: When you place the path where another entity is (easiest to replicate with a minecart in the place where you place the path block), it'll put you in the same position as if you placed it. It's weird; sorry I don't have images.