Your friends with a deep-seated fear of clowns are so right. Bloodthirsty aliens looking like circus clowns come to town and start feeding. No word yet on whether their space ship resembles a really tiny car.
When a small town is invaded by aliens from outer space who are capturing and killing the townspeople, no one takes them seriously. Why? The aliens all look like circus clowns, use weapons that look clown like, and all have painted on smiles. Only a few of the young people in the town realize the danger and of course no one believes them. Armed with an ice cream truck they try and rescue their friends.