“I can't get over how small you are!” This article is a stub. As such, it is not complete. You can help Portal wiki by expanding it.
Chapter 8 - Test Chamber 1
sp_a4_tb_intro.bsp
This is the forty-ninth level of the game, and takes place within an Aperture Science Test Chamber. This level introduces the Excursion Funnel, and the way in which it can be used to move the player and objects as well as circumvent the laws of gravity.
Wait until you've reached the second area and when possible, place the other portal on the wall next to the windows.
You should enter the portal and head for the Frankenturret. When it is in your reach, pick it up.
Go stand between the Funnel and the wall closest to it. Shoot a portal from the wall to the floor in the area below. Look for small panels with grey and white colours.
Place the Frankenturret in the Funnel and wait for it to reach the button.
Go in the Chamberlock through the door in the corner.
TEST by Aperture Science Psychoacoustics Laboratory [6:14] | Download| PlayExcursion Funnel by Aperture Science Psychoacoustics Laboratory [4:32] | Download| Play
Download | 
Play
Excursion Funnel by Aperture Science Psychoacoustics Laboratory [4:32] |