I still really like the idea of them utilizing a "family free fall" type coaster system for the ride. I can just imagine the mid ride scene: the mine cart dead ends in a cavern full of TNT barrels and, after insuing hijinks from Donkey and Diddy Kong, the barrels 'explode' causing your mine cart to fall to the track below. Foolish blue sky talk I know, and I have absolute faith in what Universal has planned, but the second I heard about the possibility of a Mine Cart Coaster, that exact scene is what first popped into my head.