The actual phenomenon itself is a result of spores that inhabit the host's body & ultimately overcome it. If you want more you could try looking up a few of the more susceptible species like 'Cordyceps Sinensis' or if you just want to see some more craziness then try doing a google image search for 冬虫夏草.
...& A few pics for more accurate measuremet:
Mr. Komatsu shared an interesting observation that I've been hearing a lot lately from vinyl makers: That the size of the larger pieces triggers something from childhood. The feeling of holding a giant toy in your hands. It's a shame, but something is lost with the change of scale.