You have to do that on Hulk and Dragons. As long as the train is mechanically healthy, Hulk won't stop over the water. It stops in the back of the house. If for some reason it was necessary, the water isn't an issue. Next time you go, look over the bridge out towards the lagoon. The large elevated area actually drains down in just a few minutes. There's a large hydraulic platform in the floor that raises to the height of the area concrete. The handrail behind the popcorn stand opens up, they drive a large HiReach out, lower it down, and drive it out to the end of the track. It's done at night as part of the track inspection.