Man Flies a Hot Air Balloon to the Bottom of a 200-Meter Underground Cave in Croatia

Austrian pilot Ivan Trifonov celebrated the 10th anniversary of a Mamet Cave base jump by adventurer Felix Baumgartner by becoming the first person to descend the underground Croatian cave in a hot air balloon. Trifonov lowered the lighter-than-air craft 206 meters to the bottom and let out a triumphant yodel before lifting off out of the hole.