It was an electric locomotive with a large battery. There were two braking systems, one electric that serviced all cars, and the other mechanical that braked the tender. An electric switch moved the train forward or reverse. Forward there were a couple of speed steps. The electric brake was a short lever, but the mechanical brake had a large handwheel, and you could make quite a show bringing the train to a stop with it.
There was also a hopper with sand and pipes that carried the sand by air pressure to just in front of the traction wheels. The consist passed in front of the waterfall into the Rivers of America and the track would often be wet depending on the weather. It was necessary to apply short bursts of sand to maintain traction. In the desert there was a small radius curve that required the brakes to be applied to avoid derailing. There was even a sign on a post to remind the operator to slow down. There was a recorded spiel for each segment, but operators were free to deliver their own. Sometimes it was necessary to remind people to stay seated.
During the day I would always move slowly through the bubbling pot of mud so guests eyes could have a little time to adjust to the dark and enjoy the air conditioning a bit.