a little known interesting fact.....about me and a cave

There is an interesting fact about me...but i'm not sure of the year or date of this event...and I tried finding information about it online but there was none. It's probably kept secret to keep from scaring people away.
A few (or several) summers ago, my family went to Carlsbad Caverns because we hadn't been there since I was too young to remember. The night we got there, we watched the bats exit the cave. It was very cool. We were to go through the cave the next morning. We woke up early the next morning because we wanted to beat the crowds. We showed up before they started letting people in for the day. We waited around and we got to go in shortly behind the first of the cave guides. As we were going through we heard the cave guide ahead of us talking in is walkie talkie with a panic/excited/concerned voice. We finally get to him and there was an enormous rock that had fallen directly onto the trail...completely crushing the hand rails and blocking the path. The guide helped us safely get around the huge obstacle and we finished the tour...We seemed very much alone during the rest of the tour..it was rather pleasant.Come to find out, they had stopped letting people in for safety reasons....they needed to inspect the cave-in and see what the danger was of more rocks falling. The cave was closed the rest of the day I believe.This may not seem too interesting, but my family made history that day. Never before or since has a cave-in ever been recorded at Carlsbad Caverns, and the odds of a huge chunk of the cave falling directly onto the walking path was out of this world. And the odds that my family was a few of the dozen or so total people to enter before they discovered the rock was very very small.My family made history....we each were 1 out of 549,587,335 people worldwide who could have experienced this secret (yet highly significant) event.