There are three types of trolls: mountain, forest, and river. The mountain troll is very stupid. It stands at approximately twelve feet tall (they are very strong), with grey skin, a lumpy body, and flat horny feet. It exudes a powerfully awful smell, "a mixture of old socks and the kind of public toilet no one seems to clean." Its nose is full of what looks like lumpy, gray glue (troll boogers).