Everything you see has been recorded at first-person perspective. It resulted in some sort of infinite patterns, like a 3D fractal with unlimited space. There is no way to get out without restarting or using cvars. Chell doesn't die by doing this. For the record: Portals can move. In Chapter 5 (The Escape) at the thirty-third level of the game, you have to place portals onto moving panels to cut neurotoxin generator tubes by using a laser - https://www.youtube.com/watch?v=B2gBNwT6aqU - This gameplay mechanism is not activated by default, so a special command was used to achieve the experiment (sv_allow_mobile_portals 1). SONG: Self-Esteem Fund by Kelly Bailey https://www.youtube.com/watch?v=pT7pVK5q8tk