With something likely to be remarked on in idle chatter with casual acquaintances, such as winning a lottery, you end up with a unexpectedly large likelihood of becoming aware of a small number of links from yourself to someone who had (Unusual Event X) occur to them.
As I alluded to in a previous discussion this sort of thing is veering quickly into the territory of the small world phenomenon in human social networks.
With something likely to be remarked on in idle chatter with casual acquaintances, such as winning a lottery, you end up with a unexpectedly large likelihood of becoming aware of a small number of links from yourself to someone who had (Unusual Event X) occur to them.