It has to be said that he had an obsession with taking selfies.
This, in itself, could almost be regarded as normal behaviour, but what he had discovered by trawling through the dark web was something else entirely. The apparatus he ordered was more than just the regular infinity mirror, which was basically just a couple of mirrors that faced each other. When you stood between them the reflection would not only become smaller and smaller, but gradually ebb away into what seemed to be infinity.
There was a room like this on the pier. People walked in through a series of cleverly positioned mirrors. However, what he was looking at now was not like this. No, this was different. This promised the ultimate selfie. If the instructions were followed carefully and to the letter, he could move beyond the image, way past the restraints of three dimensional space and time, move into the limitless expanse of perpetuity and the boundless continuum of endless infinitude.
When it arrived he spent a lot of time reading through the complex series of instructions before considering how he could put it all into practice. Then, it came to him. He realised he could take the device into the photo booth at the end of the pier. Nobody would take any notice. Visitors to the small seaside town were always popping in for a holiday snap. Who would notice him using it? Who would care? Nobody. He would need to strap all the paraphernalia to his back. He needed to build a simple harness of some sort.
When all this was done, he made his way to the end of the pier, passed the amusement arcade, looking like any other holidaymaker. He casually entered the booth. It took a few minutes to set it up. Then, with mounting excitement, he pressed the button.
The flash was much brighter than usual.
He never came out.