Here is the egg song, a few different versions. I have a laying Brahma right now who does not sing it though so some hens may not announce their egg.
hehe
This is "squatting" and usually happens (NOT always) a week or two before the pullet's first egg.
You are NEVER crazy here lol! I sit my hen through "egg labor" every day. She comes to me and yells like a wife yelling at a husband "GET YER ARS OVER HERE AND HOLD MY DANG HAND!"