Sliding Carts.

Minecraft carts slide after being stuck in a corner, and don't seem to stop unless you get in one. I haven't really tested how many carts you need, or if it only affects certain types of rails. Or if you need to break the rail or the block underneath it. It just seems to me the carts are stuck on the corner.

See youtube video. https://youtu.be/M6Jh2vjfRWk