I can't believe I took the time to do this.

If you started at abaout 18000 miles an hour (you had better be pretty
high!) when you flew this path you'd end up level with the horizon.

I think this is out of the range of most general avaition airplanes.
The neat thing is, though, if you wanted to have a real aerobatic
flight experience on a simulator, this is the one to try. Just create
a craft with the ability to go that high, that fast, with thrusters
than could do this thing. Why, you could pour coffee into a cup and
claim to have the same effects in the simulation as a real pilot would
have in the craft.