These two guys were exploring a cave, when they found an incredibly deep drop, so one of them dropped a rock to see just how far down the drop goes. The rock takes a long time before landing and making a large, echoing sound, and one of the commenters even calculates the drop to be roughly 165 metres. The video was shared to Instagram by @en.svott and @seth_null_photos on July 3 2026, where it received over 470,000 likes and 5.4 million views.
