Questions about portal 2
Q 1:if there is a blueprint of turret in extras video why cant we build it?
Q 2:if there is a blueprint of Portal gun in extras video why cant we build it?
Q 3:if there is a blueprint of long jump shoes in extras video why cant we build it?
[spoiler]not really[/spoiler]
WHY DO YOU THINK THOSE BLUEPRINTS ARE REAL? DO YOU KNOW HOW DANGEROUS IT WOULD BE ANYWAYS WITH A WORMHOLE ON EARTH? Scientists have only managed to use quantum tunneling on photons. The rest you can figure out yourself.
Hahahaha it is impossible
But possible to make the turrets, one had made a real turret with sound but with different method of making and with sounds
But it has no bullets
[spoiler]not really[/spoiler]
When you want to build things in Real Life from Portal, you would only need the .mdl, thats the best way. You cant really do something with the Blueprints 
Turrets would be fairly easy, although you wouldn't want to fire the whole bullet unless you were using a Nerf gun. But why would you build a turret that could actually shoot at you?
I have no idea how the long-fall boots work, because you still hit the ground just as hard as you would without them. Even if they take all your kinetic energy at the moment of impact and transfer it into, say, heat, you'll still splatter from the change in momentum. They'd need to reduce your terminal velocity like a parachute does or accelerate you gently upwards somehow, either of which we'd notice in the game.
And the portal gun is all science fiction. Read the end of Larry Niven's "The Hole Man" for a fairly hard-science picture of what would happen if we tried to contain a quantum black hole in a portal gun.
Maybe a concern like Aperture figured out how a Portal Gun would work, lives under us and we dont know about this concern 
(Joke)
What I would really want to find out is how to make mobility gels.
Also physics-defying except the conversion and cleansing gels. The repulsion gel gives you a bunch of energy when you jump on it, and after that acts as a perfect trampoline without bending the surface under it. Where does the energy come from? Same with the propulsion gel, which gives you more energy as you run across it. The adhesion gel is feasible, but if it's strong enough to hold you to the ceiling how do you get your feet out of it to walk? 
The gels are available in Thinkgeek but the gels don't work like that, repelusion gel works but when turned into a ball.
Propelusion gel works stretchy
Conversion gel works super stretchy
[spoiler]not really[/spoiler]
I have no idea how the long-fall boots work, because you still hit the ground just as hard as you would without them. Even if they take all your kinetic energy at the moment of impact and transfer it into, say, heat, you'll still splatter from the change in momentum. They'd need to reduce your terminal velocity like a parachute does or accelerate you gently upwards somehow, either of which we'd notice in the game.
And the portal gun is all science fiction. Read the end of Larry Niven's "The Hole Man" for a fairly hard-science picture of what would happen if we tried to contain a quantum black hole in a portal gun.
Haha I am using nerf gun bullets
[spoiler]not really[/spoiler]