I saw this at the CAboose in Denver today, inside the HO layout disoklay care:

A gold-colored UFO with a clear canopy, under which were seated five green aliens.

On the bow of the alien craft was a cowcatcher.
On the stern was a coupler.
On the top surface of the right wing was a handbrake vertically mounted.
On the top surface of the left wing was an airbrake system, and
On the rear fuselage was a sand dome.

Now I am trying to remember who sold that flying saucer kit That thing was classic.

That sounds.........well...."unidentified". Then again I have seen the SD-1701, an EMD SD, with warp nacelles. Neat idea, but I don't think it is easy to switch with, it has a tendency to go from "dead stop" to warp 2, raaaat now!

Don't forget Emmet Brown's 2-6-0 time traveling locomotive.