Valve's agonizing piecemeal delivery of footage from the Portal 2 E3 demo continues. These clips introduce Pneumatic Diversity Vents and Thermal Discouragement Beams, because simply creating conduits between two points in space (four in co-op) wasn't complicated enough.

Sure, those are just vacuums and lasers, respectively, but it's still enough to give us a headache in anticipation of future gameplay complexity. Luckily, no space-bending guns are required to see the videos -- simply click past the post break and they'll go directly into your eyes.