It gives more emphasis to the tone of command. To make matters worse, that way of saying sounds pretty rough, vulgar, and offensive. I don't know why, but it sounds like the speaker who said it got belligerent.
@hitsujisan Ah, I see. That makes sense. I've lived in Tokyo all my life and not familiar with the Kansai dialect. That's why it sounds like to me that the speaker got belligerent. It might not always be the speaker got angry. I've also learned a lot, thanks.