fwiw: Reuben Wells also broke his Engineer's neck… and everything else, no doubt:

A Fearful Ride, —We learn from the Indianapolis Journal, that a locomotive descended the inclined plane at Madison, Indiana, on Monday last, owing to the wet track, got beyond control of the breaks, and went down the plane with fearful velocity. When within a hundred yards of a freight train which was standing on the track, the Engineer, Samuel Idler, and the Fireman, Thomas Bixette, took a desperate leap for life from the flying engine. Mr. Idler was dashed against a switch signal and instantly killed. Mr. Bixette struck the ground and instantly expired. Mr. B. J. Robinson, a clerk of the Company, who was also on the engine, clung to it, and by the collision with the freight train, was shockingly mangled, though yet living.

[9 July 1855, Virginia Chronicle]

This was one of the second generation Cathcart-Baldwin cog engines gone runaway. Engineer Idler was most likely laying on the whistle lanyard pretty hard coming down that hill.