"Jose" wrote

So, she reaonably thought she was risking only pain, but was really
risking serious injury, because of the way McDonalds served their
product at an unexpected temperature.

Maybe - was this her first time having coffee at McDonalds?

Would anyone change their behavior if there was a warning on the cup that
said that the coffee was hot enough to cause a serious burn? - I doubt it
based on the kinds of accidents that happen every day when the hazard is
well known (chain saws, lawn mowers, chippers, etc., etc).

BDS