* Wear long-sleeved green pants.
* Tuck in a bright green turtleneck top with horizontal black lines.
* Wear gloves and socks that are either black or green.
* Wear large black shoes.
Head:
* Wear a puffy dark green wig with a straight-cut fringe.
* Use face paint to create a dark green oval around each eye.
* Paint your nose black.
* Leave your lips bare or use a sheer lip gloss.
* Wear black contact lenses if desired.
Accessories:
* Attach a red and black antenna with suction cups to the top of your head.
* Wear a utility belt with a variety of gadgets and tools.
* Carry a ray gun or other alien weapon.
* Wear a black cape.
Bonus Points:
* Speak in a high-pitched voice.
* Act clumsy and erratic.
* Complain about humans and their "invading" habits.