“I went wedding dress shopping and the fabric of reality crumbled. This is a real photo, not photoshopped, not a panorama, not a Live Photo,” she captioned the image.
“If you can’t see the problem, please keep looking and then you won’t be able to unsee it.”
She said the “glitch in the Matrix” almost made her vomit in the street.
In the image, Tessa’s hands are snapped in three different positions between the two mirrors and where she actually stands.
Many social media users were perplexed by what was happening in the photo, with several torn between congratulating Tessa on her engagement and telling her to run.
“This whole sequence of events is both absolutely terrifying and hilarious,” one social media user commented.
Another said: “Only you can find the most epic way to announce your engagement – mystery and excitement – congratulations!”
“Obsessed that this is the deranged way you accidentally announced the engagement,” another commented.
“How is this possible?!?! Magic mirrors,” one shocked social media user asked.
One added: “What in the Black Mirror is happening?”
Tessa explained she had gone to the bridal shop on her own and sent some pictures to her sister, who pointed out the discrepancy between the three versions of herself.
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The member of the sketch comedy group Massive Dad admitted she was stunned, falling to her hands and knees upon seeing the eerie picture and almost vomiting.
Later, she checked whether it was a live photo or a burst and neither of these seemed to be the case.
“I am freaking out, so the first thing I did was go back to the shop and ask if they were in fact mirrors or cameras,” Tessa recounted.
“My sister is a very rational person so she asked one of the tech people she works with. She told me eight men were looking at the photo and all freaking out.”
Out of options, Tessa went to her local Apple Store in a desperate bid that a “Genius” would be able to help her figure out what had gone down.