X-Jet: Flying Platform.

In the mid-1960s, Williams Research developed a flying platform called the "X-Jet" using a light turbofan engine:

This machine looked something like a flying trashcan on skids, and could carry a pilot directing the machine with two grip-type controls. It was evaluated in the 1980s and noises were made about a more capable successor, but apparently its endurance was too limited and, as was the case with most of the other one-person flying machines, it was hard to understand that it offered any utility proportional to its expense and complexity.

http://www.vectorsite.net/avplatfm.html