The last time friends Gavin Free and Daniel Grunchy, known on YouTube as The Slow Mo Guys, experimented with a six foot balloon, they recorded its explosion in slow motion. This time, they decided to kick it up a notch by having one of them actually get inside the balloon.
The film shows Grunchy struggle to squeeze himself into the balloon as it fills with water, and actually has to strip down to his underwear to make it happen. He manages to get himself in, all the way up to his neck, shortly before the balloon explodes with him inside.
And, of course, the explosion is in slow motion.