@Infoseepage @fnordius @nyrath @cstross Seriously, this looks absolutely ridiculous. Remember that this jet pack is stupendously loud, and a much quieter drone could carry a ladder instead.
Or if it has to be a person, an electric paramotor is cheap and quiet, and it doesn't involve wearing heavy bulky arm thrusters. Heck, they're cheap enough that the entire team can assault the target from the air, approaching silently.