The Sisyphus Quantum Cooling Reactor. We call it "Sissy" for short. You see all these?...

[at the lab, Ryan shows Tree and Carter the device that caused the time-loop in the first movie] Ryan Phan: The Sisyphus Quantum Cooling Reactor. We call it "Sissy" for short. You see all these? They're proton lasers, and when they fire, they cool the centrifuge right here to almost below one nanokelvin. So, basically, we're trying to prove that time can be slowed down on a molecular level. It hasn't worked yet, but we did find some promising data, after the device fired the other night. Tree Gelbman: When? Ryan Phan: 12:01 AM yesterday. Tree Gelbman: [shakes her head] Monday the 18th. Ryan Phan: [nods] Mm-hmm. [Tree gives Ryan a murderous look] Ryan Phan: What? Tree Gelbman: You created the time-loop, dummy! [Tree, Carter, Ryan, Samar and Dre sit at the cafe. Tree explains them what happened in the previous film] Ryan Phan: That's impossible. That's not what Sissy was designed to do. Tree Gelbman: I don't know what to tell you. Samar Ghosh: Well, maybe we're just discovering what it actually does. Andrea 'Dre' Morgan: An unintended reaction. Maybe we thought we were slowing time, but what if we looped it instead? Tree Gelbman: [to Ryan] Now you're stuck in this day. Congrats. Oh, and by the way? You're going to die. Again... and again... and again. Ryan Phan: [cringes] Carter, tell your girlfriend to stop trying to scare me. Carter Davis: Oh, she's not my girlfriend. [Tree gives Carter an offended look] Carter Davis: Well, wait, are you my girlfriend? [Tree remembers that from Carter's perspective, they know each other only for one day] Tree Gelbman: Kinda.