Demon hunters have a skill called Vault, that lets them instantly move 1 screen's length in about a second. With the right skills/mana, they can spam it 6-8 times. They also have a skill that makes them turn invisible for a few seconds, and a passive skill that grants them bonus movement speed whenever they use either skill.

So, instead of fleeing from the chickens screaming like a little girl like most classes...the demon hunter opts to be roadrunner and laughs at all the mobs