Actually, I was rather tired and hyper when I first saw a securitron in NV move quickly I nearly cried. I wonder if the developers were like "Hey, this securitron thing, it has one wheel, does it just go in a straight line?", then some amazing genius decided, "NO! It must move as if...ROLLERSKATING!" It makes Victor look extremely stylish when he swerves up to you cowboy hat n'all, then saying something along the lines of "We need to stop meeting like this, people are starting to talk, he he he".