A phrase describing something so incredibly confusing that you have no idea how to get through it. Comes from the Water Temple in Zelda 64, one of the most insane levels I've seen in any video game, ever. No joke - EVERYONE gets stuck in the Water Temple when they play this game, usually for weeks/months/years.
"What am I supposed to do next?! GAH! This is like being stuck in the Water Temple!!!"