Wired:

The inflation team showed up at 7:30 am yesterday. By the time they left well into the evening, 100,000 balloons were ready to descend from the heights of the Wells Fargo Arena, drowning the Democratic party’s presidential nominee and upper crust in a sea of star-spangled latex.

Balloon drops like the one that closed out the Democratic National Convention last night are commonplace by now; they’ve graced political conventions as far back as 1932. That doesn’t make them any less spectacular, though. Or any easier to coordinate. Pulling it off takes a team of wranglers and riggers, all working together to execute a balloon visionary’s master plan.

It’s actually a surprisingly complicated procedure.