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Portal 2 Hints
How can I get back to the main floor from the laser area's lower floor?
1 of 3: Jump over the laser beam and move up against the back wall.
2 of 3: Turn around and fire a blue portal onto the portal-friendly wall section that's on the other side of the chamber.
3 of 3: You can then put an orange portal on the wall you're next to and go through it to return to the main floor.
