Well, I think I have the movie for you.
Killer Klowns from Outer Space
Killer Klowns from Outer Space is the 1988 creation of the Chiodo brothers (Stephen and Charles). It tells the strange story of what befalls an Anytown, USA, as aliens arrive, in their interstellar bigtop.
Here now, these aliens have the form of clowns. Scary clowns. The fact that most people seem to react benignly to them through much of the movie is lost on me, but they are weird and creepy clowns.
And using various weapons, tool, and tricks they mess with their meals, and then take them. Nothing seems like it can stop them.
Remember, the Klowns are coming for you.