Can do not wrong... except for the lack of AC I guess.
Still. A half hour wait for something you expected to take 10 minutes while moving, considering they had no communication, is not a failure of the guests. People have anxiety, people have panic attacks. Maybe both of those aren't triggered by moving around slowly on a gondola, but would happen when stuck without any inkling that disney gives a damn or instructions on what to do in an emergency, like a disney SOS line number placed on the gondola.
This was a disney failure. Not just because the gondola stopped for too long (stuff happens, I know) but also (and for me, worse) because of their lack of communication. The guests should not be blamed for panicking, in this scenario