Again some dromaeosaurs chase after them but they make their way to the middle of the volcanic twins .
When a Tyrannosaurus chases them , Mimos imitates the roar and scare him away .
Again some dromaeosaurs chase after them but Mimos make Mimos ' way to the middle of the volcanic twins .
When a Tyrannosaurus chases them , Mimos imitates the roar and scare him away .