I've seen speculation that it IS a drone.
Jet packs burn fuel really quickly, and can't carry a lot of fuel, so their endurance is very limited, and they can't climb very far from their launch point. The TV spot I saw was interviewing people with experience in military jet packs, saying that they didn't believe their equipment could reach the alititudes described by pilots around LAX.
But they showed a quadcopter drone, with a lightweight inflatable mannequin made to look like a guy in a jet pack. Up close, it was obviously not a real guy in a jet pack, but at a distance, to a pilot flying by at 170 knots, it could be reasonably convincing.
The inflatable mannequin plus quadcopter was a LOT less expensive, and less dangerous, than a real jetpack.