But we don't know it really stuck with them at the time though?
They're retrospectively saying it did. Everyone here is retrospectively saying they felt it was weird at the time. But we don't know what they thought or said at the time because they didn't post about it. Their memories or opinions are clouded by time and other information.
Like all the people that met or knew someone who later gets arrested for violent and/or sexual offences and comes out of the woodwork to say "I always had a bad feeling about them".
Most of them didn't, but they create this narrative based on the present which they project onto the past. They only 'remembered' they'd had a bad feeling about them when they were arrested and/or convicted.
And aaaaaalll the people who apparently have a memory of encountering a serial killer, but only after (years often) that serial killer has been put in prison and/or died. I've personally had about 20 people tell me that Fred West either tried to pick them up or actually gave them a lift home. And there are hundreds if not 1000s who claim that on social media. Mention Fred West anywhere on the Internet and those tales with happen. A very witty MNetter in response to yet another MN poster who said Fred West gave them a lift home commented "you'd think he was a bus driver, not a builder given the amount of people he was allegedly driving around".
The whole Mandela effect idea was that when he was realesed from prison, there was a huge amount of publicity around it. Which doesn't normally occur for people being released from prison but does occur when people die.
So when he did die, lots of people remembered that coverage, hadn't paid a massive amount of attention to it at the time, or the repeated coverage they saw as adults when they'd been kids, and thought "wait, didn't he die and there was a whole thing about it in the media"
And lot's of people think that someone that gave them a lift or looked at them funny 30/40 years ago was Fred West.
And lots of people who had a very mildly confusing experience years ago think that it was a time slip and not just something really explainable related to real life and neurology.
I don't think that humans on earth know everything or that things outside of our current paradigm of thinking can't happen but the proposed 'evidence' of the paranormal, multiverses, time slips, clairvoyance, tarot etc is so weak and so obviously driven by people who want it to be true, who are often making money from it, that it can't be taken seriously by most people.
P.S. I'm not a sceptic. A sceptic is someone disinclined to agree with accepted opinions. So that would be someone denying the reality of covid for instance, which is backed up by clinical research, global deaths, the WHO etc.
It's impossible to be a sceptic for the paranormal, time slips, multiverses etc because none of those things are accepted opinions within most cultures and have zero evidence behind them. It would be like saying 'you're a sceptic about unicorns'. There's no such thing. They don't exist. Even if some people claim they do.