Is it technically possible to divert a lightning into a moving vehicle as in "Back to the Future" movie?
I have frequently considered what it would take to get lightning on-demand, though my application was to create a weird formation you see in sand when it is struck by lightning - called Fulgurite.

The way I've always figured that I'd do it would be to use a couple thousand feet of fine wire on a fast-payout spool, connected to a very good ground at one end.  You attach the other end of the spool to a model rocket with a BIG engine and when you have your thunderstorm, you simply launch several thousand feet of wire into the thunderhead.  

You'd probably be much better off using a helium baloon, but a rocket is so much cooler.

The wire wouldn't have to be very thick.  Any wire is going to conduct better than air, which ionizes and becomes a better conductor in the first microseconds of a lightning strike.  I always figured that thin wire is a better conductor than any human that's ever been struck, so it should work - at least as far as getting the strike.  But you'd probably be doing this in a dozen thunderstorms before it ever worked.  Forget about getting split-second timing.

88 miles per hour is about 130 feet per second.  In the movie they had at best - what - about 3 feet of slop?  That's +- .01 seconds of error?  How were they supposed to know to that degree of accuracy when the clock tower was hit?  Was the pendulum fused by the hit at some exact, measurable angle that gave them the time of the strike to within a hundredth of a second... AND they happened to print that information on the brochure?  =]