When to avoid NUS elevators?

Wow, you can't trust the elevators in NUS often enough to bring you to the level you want to go?

I don't know if she was tickled or irritated but the daughter Whatsapp me this yesterday before sitting for her mid terms.

When I was a student there long ago, the Otis elevators in the engineering block were dangerous. A classmate broke her arm when the doors closed on her. Yep even then sometimes the lifts don't work but we never had a message warning us about the risk of using them on our way to the exams.

Running up and down stairs is not bad exercise.