What is a ferndock and what does krenzled mean?

Apparently, Alan Newman was a huge Dungeons and Dragons fan. He was knee-deep in a hair-raising campaign with his 7th level druid named Krenzle when he came upon a huge overgrown bog (played out with old-school figurines, mind you). Krenzle apparently razed the bog, also known as a ferndock, and found the Cloak of Invisibility! 

They put it on hats.

True. There are two different fibers in the body. The slow-twitch and the fast-twitch. Slow-twitch contracts slowly, but it can keep going for a long time, while fast-twitch contracts fast, but tires easily.