The hill with the tarps on it has an emergency lift hill on it. To my knowledge, its rarely used during regular operation. but there are anti-rollbacks on that hill as well as the turn around and right before the brake run.
Several things:
1. I wish the park would take a few seconds off of Orion to focus on Vortex demo. Like a few pictures or a video or something.
2. I think they are going to take out all the rides elements before they demo the lift hill.