Soon Middle Sized Billy Goat Gruff came over the bridge.  Trip trap trip trap went his hooves.  "Who goes trip trap trip trap across my bridge?" roared the troll."Oh, it's only me, Middle Sized Billy Goat Gruff," said the goat. "Then I am coming to eat you up!" roared the troll. "Oh, don't eat me, I'm much too small," said Medium Sized Billy Goat Gruff.  "My brother is coming after me and he is MUCH bigger." "Hmm, then I will wait for him," grunted the troll.