Drift is caused by random sampling error or other chance events. what is another name for this phenomenon?

I believe the answer is: Luck

For example, let's say that for 99.99% of the time, people who fall down from 20th floor of a building would be resulted in death. But, due to a certain sampling error or chance of events, there is two men just passing by bringing a spring bed order as person A fall from the 20th floor, which saved his life. In this case, that person A is experiencing luck.

a is the answer because it just is