World-Record Skydive: How They Did It

When 138 people joined hands in the middle of an 18,500-foot skydive in Illinois earlier this month (video below), they formed neatly into a snowflake-shaped formation and set a world record for largest formation, beating the previous record of 109 people set in 2009.

The record-setting jump looks seamless, but it took 15 attempts and three days to get it right.

Here’s how they did it…