Back in the day I worked at a theme park in the states, and the most asked question by far was "Where do you come from?". One of the rides I managed was a log flume which had a standard script (Please remain seated, keep your hands and arms inside the boat, don't rock the boat. Enjoy your ride) which had to be said every time you loaded a boat. If I was covering, nearly every single boat you would be asked.
My favourite though, by far was when working on a launched coaster with inversions which had a lap bar. A guy who had no legs got to the train and asked why he couldn't ride. Awkward, but I explained the issue. He began shouting at me saying I was discriminating etc. My response was "If you ride it you will die" - I believe he tried to sue the park.
Another one I got quite a bit was "Do you work here because you don't get paid much in your own country?" Which I always replied with "If I was doing this back home my hourly rate would be double. I'm just here for a working vacation" - they really didn't like that.