A metal bulge appears in one of the tunnel walls next to Lorica. 

Welp that looks like something to get out of the way of. Did the gun at least harm the robot?

The robot goes down. The bulge opens to contain a couple of girls, one of whom is the one who got the Sentinels off Lorica earlier. She makes a beckoning gesture. 

"Uh - okay," mutters Lorica, and she steps in.

The bubble snaps shut, and immediately begins speeding away from the robots. 

"That was a close one," the other girl says. "Are you alright?"

"Fine, are you? I don't know what happened when I nipped off to make this so I could be useful -" She holds up the gun.

"We're fine, we've just been playing keep-away so we could rescue you before getting out of there."

"Oh. Thanks. Where are we?"

"What's left of Detroit."

"Since when is Detroit like this? Did I time travel?"

...She glances up and down the outfit. "Dunno, what year was it last you knew?"

"Late 2004."

"Oh, wow, yeah, then, by a lot. It's--1980? I think?" She mulls this over. "Yeah, I'm pretty sure."

"I don't think Detroit was slagged in 1980 either, am I on the wrong Earth?"

"...You might be on the wrong Earth, if you are expecting cities in the US to not be slagged in 1980."

"That's before Behemoth even appeared, and this doesn't look like a Behemothed city, more like the Simurgh, who didn't show up until 2002."

"Behemoth? Simurgh?"

"I'm on the wrong Earth. Okay. Well. Hi."

"Hi. Sorry we got overrun by evil robots."

"I've seen worse. They self-replicate?"

"Well, they didn't, but then they gained control of the factories that make them."

"Rookie mistake, don't do that before you're sure of your software. Okay. Their Tinker still kicking?"

"Their what now?"

"Whoever built them?"

"I have no idea. I guess anyone working on the Sentinels is statistically more likely to have survived, since they didn't turn on their creators for a while."