Yesterday I heard something that I had never heard before: the person announcing the code blue overhead started laughing.
I was in the bathroom when I heard the familiar beeping overhead and a woman announcing: "Code blue on 3 center, room 318."
A brief pause, then: "Whoops!" The announcer started giggling and said, "I mean, room 380. Code blue on 3 center, room 380. Hee hee."