There was actually a version of this ride, at the 1962 Seattle World's Fair! Truth.
And there has been found a TON of photos of the Gayway
that had this ride,
but none taken (that I can find) of this ride, from a direct viewpoint. In all the photos
the Calypso hides most of it, and beyond it, you can make out the go-kart attraction.
Here's what I got from one black and white pic. And it did JUMP like a kangaroo, taking off
and then landing on it's single tire under the ride vehicle. Looked rough to me, and at age
9... and I didn't want to ride it, at - all.
EDIT!!! And I just found a "Gayway Map" during the 1962 World's Fair,
and the ride in question was called the ...I love this.....Flying Coaster