This calls for a science experiment. The next time one of us is riding the monorail and the trains are full, try to get on a far side at a window. Halfway through the ride, ecstatically point out the window & shout: "Look, Sasquatch!"
If my hypothesis is correct, this experiment should produce one of two results:
Possibility #1: All the passengers get up, and outta sheer curiosity to your claims, rush over to your side of the train, resulting in an accurate confirmation on whether or not the monorail-tipping fear is warranted.
Or
Possibility #2: The passengers misunderstand your shouted exclamation, and assume you are saying "Look, Sasquatch", as in you are addressing the only sasquatch in the train to come over & look. If this is the case, you've simply made a new hairy friend, but have failed to reach a firm conclusion on the monorail-tipping inquiry.