Dude, it's me! Casey Jones!

[He'd shout "Goongala" to prove it if that wouldn't attract every single robot in the place.]

And if you're not a robot then how come you got so big, dude? And what happened to your voice?

[Casey will figure out that this isn't the Mikey he knows at around the point he remembers the alternate universe he once saw in an alien portal. Of course, he probably won't remember that until the threat of getting murdered by a robot is less at the forefront of his mind.]