Serial Killers and Statistics

Last night, 2:15am -- I am awoken from a nightmare when Y comes into our room to go to sleep.

Me: Can you please make sure that the door is locked.

Y: Okay...

[returns]

Me: Did you check?

Y: Yes.

Me: Are you sure?

Y: Yes.

Me: It's just that I was having a nightmare, so I want to be sure that you checked.

Y: Yes, I definitely checked.

Me: There was a serial killer in my nightmare.

Y: You know, serial killers are extraordinarily rare.

Me: We've fallen on the wrong side of the statistics more than once.