The "good ol' days"...
when you'd strap an engine on it and see if it worked. :-)
(I especially see +Nikki C
riding this one...)
I think it must be human nature to want to strap engines to things. When I was 12 my dad caught me with his wrenches, just about to remove the engine from the lawn mower. I needed it for my erstwhile go kart. :-)