Warnings Active: Orb Hitting Body, Orb Receiver

Now we must take the principle established last time and use it to power a moving platform. This time, the positions are reversed; instead of making a portal pointed toward the receiver, we must make a portal for the orb to go into. Look for a scorch mark on the wall to see where the portal should go. After the orb is in the receiver, make another portal above the now-moving platform. Look through the orange portal to time your stepping into it; since the entry portal is on the floor and the exit portal is on the ceiling, all you will be doing is falling. Use the platform to go to the next part of the course and go into the elevator.

Portal Walkthrough