History Film / HappyDeathDay2U

** Inversion, further to the above: when Tree wakes up on the 18th (again!) she's so busy anticipating his lines that Carter never says "I don't know if you remember my name, you were pretty wasted". Tree just says "Pretty wasted?" [[spoiler: Since Carter's dating Danielle in this universe, of course the alternate Tree knows his name. If Tree had let Carter talk, he would have said something like "I don't know if you remember ''coming back here'', you were pretty wasted last night."]

* JerkassHasAPoint: Dean Bronson may be a jerk to Ryan, but he's clearly angry and upset over the likely thousands--if not tens of thousands--of dollars in damages not to mention the potential criminal and civil liability of disrupting a ''hospital'' because of a student's thesis project. Of course, there are ''significantly'' better ways of handling it than how he did.

** [[spoiler:Lori's sneakers in this film are light gray with a white sole, while the killers' in both dimensions are black with a white sole.]]

** Carter compares Tree's situation of having to revisit the events of the first movie from a different perspective to ''Film/BackToTheFuturePartII''. This is cemented by her attempt to stop Ryan from closing the dimension by accelerating her dad's car to 88 m.p.h. and ramming a power plant transformer. Whether she experienced 1.21 gigawatts is unknown. Also, the wood chipper company is called "Biff's". Finally, after Tree is thrown through the observation window of the MRI room, the music playing is a dark reprise reminiscent of the soundtrack from ''Film/BackToTheFuture''.

** Inversion, further to the above: when Tree wakes up on the 18th (again!) she's so busy anticipating his lines that Carter never says "I don't know if you remember my name, you were pretty wasted". Tree just says "Pretty wasted?" [[spoiler: Since Carter's dating Danielle in this universe, of course the alternate Tree knows his name. If Tree had let Carter talk, he would have said something like "I don't know if you remember ''coming back here'', you were pretty wasted last night."]]
** [[spoiler:Lori's sneakers in this film are white, while the killers in both dimensions are black with a white sole.]]

** Carter compares Tree's situation of having to revisit the events of the first movie from a different perspective to ''Film/BackToTheFuturePartII''. This is cemented by her attempt to stop Ryan from closing the dimension by accelerating her dad's car to 88 m.p.h. and ramming a power plant transformer. Whether she experienced 1.21 gigawatts is unknown. Also, the wood chipper company is called "Biff's".

''Happy Death Day [=2U=]'' is a 2019 [[ScienceFiction sci-fi]] {{black|Comedy}} [[HorrorComedy comedy]] {{slasher|Movie}} film, and the sequel to 2017’s ''Film/HappyDeathDay''. Christopher Landon returns as director while also writing the film, and the entire main cast returns to reprise their roles, with several new additions.

* JerkassHasAPoint: Dean Bronson may be a jerk to Ryan, but he's clearly angry and upset over the likely thousands--if not tens of thousands--of dollars in damages not to mention the potential criminal and civil liability of disrupting a ''hospital'' because of a student's thesis project.

* EvilDoppelganger: [[spoiler:The original version of Gregory from 'our' Tree's universe was not a good person by any definition, but the alternate universe version is an outright murderer.]] In contrast, the first film's killer, [[spoiler:(Lori Spengler)]] actually is the good person they pretended to be in Tree's universe.

* GoodCounterpart: Lori was the villain of the first film, but in the alternate timeline, it was her, not Tree, who had an affair with Gregory, removing her reason for hating her. When a handcuffed Tree is attacked by Babyface, Lori pulls her into an elevator to save her, then goes ahead of her carrying a sledgehammer to defend her.

* EvilCounterpart: [[spoiler:The original version of Gregory from 'our' Tree's universe was not a good person by any definition, but the alternate universe version is an outright murderer.]] In contrast, the first film's killer, [[spoiler:(Lori Spengler)]] actually is the good person they pretended to be in Tree's universe.

* AllThereInTheScript: It's not until the end credits that you find out that Ryan's lab-mate Dre doesn't have a celebrity-baby-style weird name: it's short for Andrea.

''Happy Death Day [=2U=]'' is a 2019 sci-fi HorrorComedy and the sequel to 2017’s ''Film/HappyDeathDay''. Christopher Landon returns as director and writer, and the entire main cast returns to reprise their roles, with several new additions.

A third film, ''Happy Death Day To Us'', is currently in development. Early buzz suggests it will also be a crossover with spin-off movie, ''Film/{{Freaky}}''.

** Then played straight. [[spoiler: When Gregory finally has Tree dead to rights, he decides to shoot his wife--who is also his accomplice--instead and then gets distracted by Carter. This gives Tree a chance to run and continue the fight. Then, when he has her dead to rights ''again'', instead of finishing her off, he lets her get in a last word. See PreMortenOneLiner above.]]

* WoodChipperOfDoom: Invoked and PlayedForLaughs as one of the way Tree offs herself during the FailureMontage as they try to figure out how to close the loop.

* BigDamnHeroes: Tree gets a couple moments coming to other charaters' rescue from getting killed.

After freeing herself from her birthday death loop, Tree Gelbman (Creator/JessicaRothe) is ready to get her life back to normal now that she’s with Carter (Israel Broussard). However, a school science experiment goes wrong and sends Tree back to Monday the 18th with a new killer on the loose, forcing her to once again relive her birthday, but with [[AlternateTimeline a few differences]].