How close are they?
Wait for it....
The only aliens I have seen are those that put ketchup on ketchup.
Extra terrestrial.
Oh... I believe they walk amoung us. Next time you see Slotted, you should check him... he doesn't have a bellybutton.
Aliens wear Crocs.
Extra terrestrial.
I've met people who can't possibly be "of this earth" so I'm voting they're here.
How close are they?
Wait for it....
He's right behind you!