I think we all fantasized about owning a functioning portal gun after the first time we played Valve's puzzle shooter. Of course, depression hit all of us once the reality set in that we could never play with real portals (stupid science and your stupid laws!).
Well, seeing this amazing video by visual effects artist Jason Craft, which shows us what Portal would look in the real world, may give me the strength to move on. It also helped me realize that I would probably kill myself in five minutes if I actually had one of those guns.