Roller Coaster Tycoon 3 death roller coaster?

Question

I am wondering how the h**l do ppl make roller coasters that kill ppl

LIKE THIS ONE:

http://youtube.com/watch?v=uQrC_C6SexI

Whenever i try to make a rollercoaster, where it comes off the tracks it doesnt let me turn on the green flag

Any help???

Answer 1

Never played 3 but in 2 you have to use the Ejection/Impulse type coaters because those don't have to be circular. Then the rest is up to your imagination