steal someones pool water, lol. build two walls half a mile apart, put a potal big enough to drive a car through, then get going at top speed. OH, brilliant idea, you could conserve space for drag racing. or make like a world race with portals in different countries, you'd need quite a few portal guns though. also skipping traffic (this is all if you could make the portals bigger) if not. it would make using the bathroom easier, lol. or a portal from my bedroom to my basement because thats were all of my videogames are. and one from my basement, bedroom, or living room to my kitchen.