When Gaz is talking to Dib in Battle Dib about the test he's taking, one of the time it shows a kid/person with eyes exactly like South Park. Odd.......
Dib : " You can't make me look, I'll just shut my eyes! "
Zim : " Oh, you'll look, you have to breath sometime..."
Dib : " No I - Wait, what do eyes have to do with breathing? ".
GIR: wait if you destroy dib in the past that means he wont ever be your enemy. then you wont have to send a giantrobot back to destroy him - and then he - WILL be your enemy so you will have to send a robot BACK - (head explodes)