Just wondering why you call these "eerie"? For any given event, certainly unlikely. But in the grand scheme of all possible human interactions, it is actually extremely likely that something like this will happen at least once in your life - and the more you travel, the more likely it is.
It's called the likelihood of improbable events. Even the most improbable event becomes likely if you give it enough chances to happen. If you toss a coin ten times, it is extremely unlikely that you will get ten heads in a row. But if you do the test often enough, then it becomes very likely that it will happen at least once.