How they did it

For nearly four minutes — captured in a single, unbroken camera shot — the machine rolls metal balls down tracks, swings sledgehammers, pours water, unfurls flags and drops a flock of umbrellas from the second story, all perfectly synchronized with the song. A few gasp-inducing, grin-producing moments when the machine’s action lines up so perfectly, you can only shake your head in admiration at the creativity and precision of the builders.