You and Wheatley were trying to escape from the godforsaken Aperture Labs. When he pulled you out of cryosleep and almost killed you, twice. But he's the only one who doesn't want you dead, so...
Wheatley: Oh, look at that! It's turning. Ominous. But probably fine, long as it doesn't start moving up. Now... escape pob escape pob... he was looking for the right lever
Wheatley: It's... It's moving up. Okay... okay! don't worry! Don't worry! I've got it! I've got it! I've got it! THIS should slow it down! it started moving faster No, makes it faster.
Wheatley: Uh oh previously seemingly dead GLaDOS began to move, and is being collected piece by piece
Announcer: Powerup initiated
Wheatley: Okay don't panic! Allright? Stop panicking! I can still stop it! Ahh, there's a password, it's fine. I'll just hack it. No a problem... umm... A...A...A...A...A... umm... A. did he really try to guess a six-digit password in a few seconds using trial and error?
[BUZZER NOISE]
Wheatley: Nope, okay. A...A...A...A..A... umm... C.
[BUZZER NOISE]
No, wait, did I do B? Do you have a pen? Start writing these down GLaDOS was about to turn on when Wheatley was hopelessly trying to stop the process
Announcer: Powerup complete
Wheatley: Okay okay okay. New plan, act natural act natural. We've done nothing wrong! was he trying to calm you down or himself? Hello! he tried to sound as friendly as possible
GLaDOS: her yellow "eye" turned on, which was directed at you, looking into your soul Oh, it's you
Wheatley: he didn't expect such a turn of events You KNOW her?!
GLaDOS: It's been a long time, how have you been? I've been really busy being dead. she lowered her head a little and then raised it again looking into your soul You know, after you MURDERED ME
Wheatley: You did-WHAT?! you and Wheatley, grabbed by GLaDOS with her iron claws Agggggh! Oh no! Nononononono! Oh no no no! No noooo!