In this Smithsonian overview, makers and operators point out that they are technically rocket belts, not jet packs. Lots of great vintage footage, including a clunky pre-GoPro helmet cam.
Includes a great interview with test pilot Bill Suitor, who flew over a thousand flights from 1964 to 2012 using a Bell Rocket Belt, one of which is in the Smithsonian collection.
The full episode is scheduled to air next on 15 July.
• Incredible Flying Jet Packs (Smithsonian Channel)