When you are doing a girl doggy style, and you wrap your arms around the girls chest, and around her arms, while elevating her upper body. Then pull out quickly and insert your member into her anus and deliver the goods.
In turn this will make her very unhappy and unable to extend her arms and screaming in an animal like manner. Therefore making her look and sound like a Velociraptor.
The Brown Raptor should and could be pulled on any girl that is willing to do this.