Nick star Lucas Cruikshank is the expert on everything extraterrestrial thanks to his show Marvin Marvin, but sometimes even he gets stumped by some out-of-this-world customs. He chirped, "The people angrily honking at me are just saying hello, right?" Sounds like a pretty alien way of saying hi, if you ask us. In fact, it got us thinking... how do aliens really say hello out there on planet Klooton? Well, we've got a few tips. Check out how to say "what's up" on another planet!