Cemented while staring into space and stuck on the current thing: that the only two Shadow toy lines (Madison's oddities in the mid-70's and Kenner's '94 movie line) ever made both feature weird vehicles lends my collection an interesting - if perplexing - cohesion (which is the best kind of cohesion, IMHO):

At least the Kenner ones are moderately less anachronistic (and "side-swiping swords" are a now requirement for my next car)…