Terrifier (2011, Damien Leone)

This is a surprisingly badass 20-minute clown-slasher with some great gore effects. Plot is really basic - a chick is driving through the middle of nowhere, on her way to New York, when she stops at a gas station where the attendant is busy chewing out a sinister looking clown who apparently threw his feces around the restroom. The clown appears to leave, but after the attendant excuses himself from giving the woman directions back to the interstate to check on a peculiar noise inside, the chick soon happens upon the gruesome hacksaw dismemberment of the pump-jockey. From there, the killer clown is hot on her heels, murdering ANY potential rescuers...

"Terrifier" is sweet and to-the-point and that simplicity works so well for several reasons: 1. The clown is creepy looking. He's looks evil as all shit! 2. The gore effects are VERY well done and nasty looking. Seriously, if you're just going to make a short, 20-minute horror with obvious slasher fundamentals, the best thing to do is dish out some impressive effects. The ending, in particular, is pretty sadistic and a little on the misogynistic side. If you're looking for a rather vicious little short, than give "Terrifier" a watch.