Whether the Martin Jetpack even deserves the name is controversial:
The fact that the device reached no more than 6 ft. of altitude during its various test runs at
could indicate that it’s not achieving true flight, but a limited amount of lift, due to a phenomenon called “ground effect.” Spinning blades can create a cushion of air below a vehicle, which is how hovercrafts glide across the water. Oshkosh
That, and other abuse is being heaped on the startup by its competitors, in a Popular Mechanics article.
David Klaus forwarded the link along with his own comments:
More breathy coverage of the fledgling commercial jetpack industry. I remember Linda Bushyager once saying about the NASFiC, “It was an idea whose time should never have come.” Whether that applies here, further deponent sayeth not. Best comment I ever saw about jetpacks: comic book scene in which the Atom stares, jaw-dropped, as the villain escapes and says, “Wow. Jetpack Hitler. Reality has jumped the shark.”