Most horror shorts show their low budget with bad lighting, poor acting, and/or cheap effects.
Slash-In-The-Box wins on all fronts. At five minutes, it runs the risk of being too long for a "hit viral video" but the pacing is excellent, and it never feels like it's dragging. The actors look great, the cinematography is beautiful, and while the jump scares may not work as well as the director probably imagines, the last shot is the payoff that the entire piece builds toward, and it works wonderfully. In fact, I'm not sure how they did it, but it's a neat bit of effects magic.
This is a perfect example of a simple concept executed extremely well. The director and his team (including Producer/DP Leigh Scott of Transmorphers infamy) come from a sordid history of terrible DTV schlock, but they seems to be making up for it here. Can't wait to see what else these filmmakers have up their sleeves.