As a child, you’d been obsessed with the concept of teleportation - instant travel from one place to the next. You did well in school, proving to be a genius in mechanics and theoretical psychics, and with your research grant from MIT you had successfully created what you hope will be the world's first successful spacial bridging.
You looked out at your testing chamber, a massive metal room you'd built under your house with a large supercomputer on one side and a blank wall on the other. A portal would be created onto that wall, and a second portal would be created wherever you programmed it to.
According to your calculations, the portal would need to be scaled properly. Due to the properties of the spacial bridging effect, if the portals did not manifest at exactly the same size, the size of anything or anyone that came through the portal would be altered accordingly. You'd decided to see it as a feature.
Finally, it came the big day. Giddy with maybe too much excitement for a consummate scientific professional, you pressed the big red button labeled "ACTIVATE"