Has this happened to anyone else while taking a CPR class?

During the "practice" part of the course, I just yelled out:

"Call AED and get me a 9-1-1".

It took like 5 minutes for everyone to stop rolling on the floor laughing, to include the instructors.

Uhm, AED is what you use on someone in a cardio crisis. 911 is what you call in an emergency.

Hahaha, I'll laugh at that now!

were they laughing at you because you have some form of tourette's?

That sounds funny, you accidentally switched the two around? I would politely be laughing at you as well!