A New Impossible Coin [Super Mario 64]
UncommentatedPannen shows that there's yet another impossible coin in the game, located in the huge version of Tiny-Huge Island. Specifically, there's a coin spawner there that's intended to spawn 5 coins in a horizontal line on the ground. However, this coin spawner's located under the ground, causing the most uphill coin to not load properly. In particular, this coin spawns about 49 units below the ground, triggering a failsafe that causes the coin to immediately unload. Currently, there's no known way to collect this coin.