It’s easy!
First, you're going to want to act like you've just learned the moonwalk:
Via andpop.com
After that, be sure to give the camera a nice, confused look. Something that screams "I just landed on this planet."
Follow that up by inventing your own language. Something like "OoOOooOOh!!!"
At this point you're going to want to trip over your two feet:
Via reddit.com