Fear is a story of coincidence.why?

Fear is a story of coincidence.why?

because,

the events occurring in the story is all coincidentally happening and mostly because the protagonist was making up in his mind that the would be robbed, every little things happening in his surrounding was linking to the same assumption

from the beginning of the story

  1. the teller yelling the amount to be withdrawn
  2. A man following him right after he went out of the bank
  3. the man on the bus and him having the same destination as the protagonist
    every thing is a coincidence and most precisely it’s just bulked up on his head