I was a lifty in CO for a year.
1.) If someone starts to fall off the lift while you are putting them on it and they start to make their way out of the terminal, run back and hit the STOP button as soon as possible. DO NOT try and keep putting them back on the chair while the chair is on its way out of the loading area. I had a natural inclination to keep trying to get them on the chair instead of stopping the lift. Hilarity ensued.
2.) Don't go to work on acid. It's intense.