Where are we going? Are you coming back? What's that noise? Is that a gun? Do you smell something burning? Ooooohh... what's in heeeere?

Momentum, a function of mass and velocity, is conserved between portals. In layman's terms, speedy thing goes in, speedy thing comes out.

Please note that we have added a consequence for failure. Any contact with the chamber floor will result in an unsatisfactory mark on your official testing record, followed by death.

Remember, the Aperture Science Bring Your Daughter to Work Day is the perfect time to have her tested.

Let's be honest. Neither one of us knows what that thing does. Just put it in the corner and I'll deal with it later.