The experience that Bart had on Halloween evening is known as the foot-in-the-door phenomenon.
This is a theory that posits that you can get people to carry out a larger, more significant request, if you start them off with a small one.
Bart fulfilled the relatively small request of smashing pumpkins which made it easier to convince him to do a significant request of throwing eggs at police cars.
Find out more on the foot-in-the-door phenomenon at https://brainly.com/question/12971117.
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