Ah, a twist in the tale! Reverse trains on a collision course, how intriguing. Let's unravel this mathematical mystery:

We have one train leaving Chicago at 40 miles per hour and another train leaving Miami in reverse at 30 miles per hour. The distance between them is still 1000 miles.

To determine when they will collide, we'll follow a similar approach as before. Let's assume after time 't' hours, they will meet.

In that time period 't', the first train from Chicago would have traveled 40t miles while the reversed train from Miami would have traveled 30t miles in the opposite direction.

Since they're moving towards each other, we can set up an equation:

40t + 30t = 1000

Combining like terms:

70t = 1000

Simplifying further:

t ≈14.29

So after approximately 14.29 hours (assuming both trains maintain their speeds), these reverse-bound locomotives shall find themselves face to face!

Just remember to pop some popcorn and enjoy this peculiar spectacle from a safe distance. And if you want more math enigmas or unconventional scenarios to ponder upon, don't hesitate to let me know!