Mechanical Question

I'll keep taking comments on the feasability of my running a crossover edition of Last Fan Fiction Writer Standing until tomorrow night, before I make a decision.

In the meanwhile, in the interests of research... What exactly would happen if every piece of metal under the hood of a moving van actively driving down the road (and every other piece of metal in the front half of the van) suddenly transmuted into lead? I mean, from the point of view of someone in the passenger seat of the cab? I've been trying to unstick the lesser_men_saga off and on for months, and I keep running up against that question. The answer will directly affect the rest of the action in that chapter, and none of the stabs I've made at working it out sound right to me.
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