Reply to "Double Track Helix Question"

I was thinking last night, how nice it would look, to have two locomotives racing up the double helix at the same speed on opposite sides, and when they got to the very top, the pinnacle, they would slam head first into each other.  To add to this effect, the fronts of the locomotives could be packed with fireworks.  Upon impact, the fireworks would detonate.  Wow, just wow!