You might surprise yourself in an actual situation. I was in my apartment swimming pool a few years ago with a young couple. They were in the deep end but really should not have been. The guy started having trouble, and i thought to myself, i cant stand here and let this guy just die. Unfortunately, i did not make the best decisions after that, and then had to call for help myself, and fortunately someone was there to pull us both to safety.
I didnt want to hear anyone say "drown" out of the context of water after that (i was all like, thats not drowning! Its serious!), but im okay now, and i learned what to do if it ever happens again, and i still consider myself a hero