A Monster?

" I heard a monster! " Dipper cried. " Let's get out of here! "

" Don't go! " a voice cried. " Who said that?" Eddy asked.

" Look! " Poppy said. " Someone is behind that tire pile. "

A truck peeked out. He had really big tires.

Dipper gasped. " A monster! " she cried. " Let's go! "

" Wait! " the truck called. " I'm a monster truck. " But I'm very friendly. "