One good thing about testing with a partner was that there could be very amusing moments. Shadow was obviously overconfident, thinking he could outwit the AIs with his own "magic," but even that wouldn't work. They had to be beaten at their own game.

When Shadow faceplanted on the wall, Chell looked up at him and smirked, folding her arms in an amused manner. The only problem was that Shadow had to grasp the use of portals, and Chell didn't have all day to wait for him to learn. She would continue best she could, hopefully making it as easy as possible for him.

Looking around the area, Chell had to figure out how to get just enough speed to propel herself from the slanted white wall above onto the platform. She had gone too far last time, and Shadow had not gone far enough. Walking forward, she found two white walls parallel to each other, one above the ground and one on the ground. If she positioned the portals right, she could fall through an infinite loop. However, she needed Shadow's help to move the portal to the slanted wall after falling a certain distance.

Using the ping tool, she motioned to Shadow and pointed between the infinite loop walls and the slanted wall. Placing her portals, she fell through the two parallel walls in an infinite loop, falling several times until she turned off one of the portals. After coming out, then she pointed back up at the slanted wall. Hopefully Shadow would understand what she was getting at.