Every time a Clown gets a hard-on while in a clown car packed full of other clowns. The Clown's boner then causes all the other clowns to receive erections. This causes the process of leaving the car to take a longer time, and sometimes scars some children as they see clowns with boners sticking out of their funny clown pants.
Slappy the Clown: "Hey Little Timmy wanna see a balloon animal"
Little Timmy: "Yes Please"
Morgan Freeman; "That is known as the Carnival Penis Effect"
by SlappyNuts February 19, 2014
Get the Carnival Penis Effect mug.