But just then up came the big Billy Goat Gruff.

"TRIP, TRAP! TRIP, TRAP! TRIP, TRAP!" went the bridge, for the billy goat was so heavy that the bridge creaked and groaned under him.
"WHO'S THAT tramping over my bridge?" roared the Troll.
"IT IS THE BIG BILLY GOAT GRUFF," said the billy goat, who had an ugly, hoarse voice of his own.