I was on the 3rd floor. I had my cell phone with me, but I used it to tap on the door because my friend couldn't hear my knock...and I broke it!!!! The good news is...I was fully clothed (in my cotton pajamas)!
You know, I took friends to SSR and we were all watching Lifetime and they commented how quiet it was even though there was so much activity outside our 1st floor patio.
I told them the glass was soundproof, so my friend did a Mythbuster and went outside closed the door and started yelling at us.

They were impressed, but I guess you would have to yell at passerbys from your patio if you ever got locked out

I never thought about being out and not being heard
