Grug know how Grug get dark, shiny, sharp rock for tip of spear? Send imaginary shiny rocks using Flat Earth Wide Web to other Grug who already collected shiny sharp rocks is only way Grug can think of. Grug no think that antler pushing will work to make grey, dull rock sharp. Guess if Grug can't get shiny, dark, sharp rock to use, Grug have to hit grey, dull rocks together until sharp. <|endoftext|> >Grug think this cave wall picture pretty funy