An article about a whale jumping onto a boat ended up talking about how often rare things occur. It’s hard to believe some of the stories in the article really happened.
The best one I know of personally is a family with seven children who had three boys born on the same day two years apart. In other words, they had a boy, then two years later (to the day) had another boy, and two years after that, on the same day, a third baby boy. The father called MIT to get the odds but I don’t remember their response. It was probably something to the affect of, “Will you please buy me a lottery ticket?”