Near the end of the game, there is one place where there are what look like three platforms (pumps) moving vertically in unison. To the left are three red orbs which, if you use the tractor beam, will allow you to stop one platform each, which staggers the platforms and makes it easier to pass through this area.
Do not do that. Do not touch those orbs.
Instead, line up next to the top-left corner of the first platform, but far enough below the air vent, and make a run for it as soon as there is a gap.
With good timing, you should be far enough right that when the last platform hits, you get squeezed to the right and into the tunnel, and not into the vents.
With even better timing, you don't get hit by the pumps at all.
This video from "aka Scratch" demonstrates this achievement.