Write a story ending with Do not count your chickens before they hatch

What is the problem with the following sentence: cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.

Ihave no idea what the explanation is.

In “the bet” by anton p. chekhov, what motivates the lawyer to participate in the bet?