I apologize if there is a thread for this already, but I didn't find one.
The point of the thread is this:
Post any cool amusement park/roller coaster/etc. ideas here! If you have any questions about it, ask here, too!
To start things off, how about an inverted giga/mega? Obviously, there's gonna be bracing/strengthening need, but would the forces be unharmful? Or is it just the same?