If you don't already know, Killer Klowns is about a small town that is invaded by a circus tent shaped spaceship full of killer clowns. Through the movie, they turn their victims into cotton candy, try to stop people with a popcorn gun, and use a balloon animal to track the main characters through the woods. The good thing about this film is that it doesn't take itself seriously, and the makers want the audience to laugh with them. While there are countless classic scenes from this movie, this guy compiled a pretty good collection to give people a taste of what to expect from this movie.
Another thing I liked about this movie is that it is pretty much in real time. That's rare with movies in general, but especially horror movies. The clowns are introduced 10 minutes into the movie and it apparently only takes an hour and a half for the few remaining townspeople to figure out how to take them down.
All in all, if you have the time, definitely watch this movie. It's on Netflix instant if you have a membership. At the very least you'll get some good laughs and get a craving for carnival food.