It's just a reverse traceroute:

My claim that this website’s traceroute was the path your packets took to reach my server was a bit of a white lie. To calculate that, I would’ve had to be able to run a traceroute to my server from your computer. Instead, I ran the traceroute from my server to your computer and just reversed it. That’s also why the traceroute at the top seemingly loads in reverse order.

If I run traceroute to this server I get totally different results, ips are similar, but always different.

To run traceroute on *nix:

traceroute how-did-i-get-here.net

You may have to install the traceroute package

On windows:

tracert how-did-i-get-here.net