However, it, too, didn't make it into the game, likely because making puzzles with redirection cubes was easier than making them with the gel. With the Peer Review DLC, this gel was actually replaced with Reflection Gel, which causes any lasers that hit it to bounce off.It was removed because testers got disoriented and couldn't complete test chambers where they needed to use it. There's still enough code left over for a skilled programmer to fake it had it made it into the game, it would have allowed the player to walk on walls or ceilings. GLaDOS's dialogue makes it clear enough that it did happen, though we just don't know for sure how it happened or how Caroline reacted to it. The scene where Caroline was uploaded into GLaDOS.Rick the Adventure Sphere had several deleted lines, including some dialogue with the other cores.Several of the Space Sphere's lines are unused in the final game, including a few of him regretting his desire to go into space when he finally gets there.