McKay: In a spectacular feat of multi-dimensional mathematics, I have discovered a way to send the ship back along the path it previously traveled bypassing the navigation system all together.
Sheppard: Wait a minute, you're talking about putting this thing in reverse?
Sheppard: I just suggested that two hours ago.
McKay: And naturally I dismissed it out of hand. But then I realized that, including the original designer, not one but two versions of myself have failed to make this work. I had to think not like me. In fact, I had to think the opposite of me, and it doesn't get more opposite than you.
Sheppard: …I'll take that as a compliment.