DOH! sry.. my bad... forgot about the rigids...

Ok, not sure on this, but have you tried "parenting" one end of the lightning to the.... wait, your objects are still keyed to move right?

...dam..

Ok, well, if it is supposed to happen before they move, then maybe you could just make 2 locators for the lightning, and group one of the the locators to the falling object maybe?

hmmm... how about drawing a curve, and attaching a PFX lightning brush to it?

Dam, I'm kinda stumped here... very tired... will think on this, and check back in the AM...