While at the party, Chris meets and tries to start up a conversation with the one Black guest besides himself - the husband of a (much older) white woman. The audience is meant to already recognize him as Lakeith Stanfield's character from the opening, now acting and dressing (there's no other way to put it) like an old white man; but Chris thinks he recognizes him too: As a friend from he and Rod's old neighborhood. When he tries to sneak a photo to send to Rod, the camera-flash triggers a kind of psychological breakdown in the man, and he starts shoving Chris and telling him to "Get out!"
Sure enough, Rod is able to identify the photo as their old acquaintance, but there's a problem: He's supposedly a "missing person" (Rod's attempts to convince the police of his theories are... less successful). Having now discovered a hidden box containing "selfies" of Rose posing with dozen other young Black men (including "Walter" and one woman - "Georgina") and accepting that he is indeed in real danger, Chris tries to flee... but it's too late. Mrs. Armitage's hypnosis has rendered him incapable of resisting, and he's been "selected" for a sinister experiment the only escape from which is a desperate, blood-soaked gambit involving mad science, illegal surgery, brutal beatdowns and a hunting rifle.
WHAT WAS ACTUALLY GOING ON
As revealed by a television broadcast shown to Chris after he's hypnotized for the final time after his initial escape-attempt, the deeper backstory is that the Armitage Family and their friends are members of a cult-like group called The Order of The Coagula, who had sought (under the leadership of Rose's mad scientist grandfather - the one who placed second to Jesse Owens) the secret of extended-life through brain-transplantation.
Rose's parents (accomplished mad scientists in their own right) had managed to realize that the Coagula dream through a combination of his surgical skills and her hypnotism. As it turns out, the transplantation will only stick if the original consciousness of the "patient" remains in the original system i.e. regressed but "alive" in the hypnosis-induced Sunken Place. Rose and her brother are part of the operation as "wranglers" who procure Black people to be auctioned-off as replacement-bodies by the Order - him via abduction by the metal-masked stalker, and her by seducing Black men (and possibly also "Georgina" - it's unclear whether their photo indicates a friendship or more) and luring them to her parents.
Speaking of Walter and Georgina, they were only pretending to be the Armitage's live-in help as part of the ruse to trap Chris. They're actually Rose's Grandma and Grandpa inhabiting their "new" young, Black bodies - hence "Walter" (who we're told "almost got over" placing behind Jesse Owens) being so fond of showing off his running skills now that he's got a... well, a more Jesse-esque body of his own. Likewise, the disturbed man at the party was "really" the original husband of the older woman. The flash from Chris' camera, however, is evidently able to scramble the signal and momentarily release the mind's original consciousness from The Sunken Place, which he ultimately uses to his advantage in order to escape. He almost blows it by stopping to rescue an injured Georgina (not realizing what she really is) because she reminds him of his mother - memories of whom Rose's mom had exploited as an "in" for her hypnosis.
DID CHRIS ACTUALLY ESCAPE?
At the very least, he didn't die (or get hypnotized out of existence) at the Armitages' as was planned - though it's not clear whether or not anyone is going to believe his story with Rose's family killed, their house (and thus much of the evidence) on fire, and Rose herself left near-death in the middle of the street. When Rod pulls up in what we first assume is a police car (it's actually a vehicle from his TSA job at the airport), it's mainly meant as a final "gotcha" at the expense of audience expectations i.e. the cops showing up would be a "good" sign in any horror film but this one. But it's also a reminder that the real cops didn't believe Rod when he went to them for help.
It's also true that the extent of the conspiracy is unknown. We meet three post-transplantation victims (not including Chris) but it's unknowable how many times this has been done before. Rose's cache of photographs suggests almost a dozen in total from her "wrangling" alone, and who knows how many more have been procured by the brother or if they were even the only ones with that particular assignment. Chris certainly wasn't meant to be the last - prior to his big escape scene, we see Rose up in her bedroom Googling "Top NCAA Prospects," presumably searching for her next target... and the audience never officially sees her die.
- Get Out (2017) release date: Feb 24, 2017