The other night I was out for a run when I turned a corner and found myself looking at real life CAROLERS. As in, a group of people singing "O Come All Ye Faithful." I was quite amazed at the sight. Even though I've been aware of the existence of carolers my entire life, and I've seen them all the time in videos, this was the first time I ever saw them with my naked eye. And as I observed this phenomenon for real, I was struck by what a bizarre thing it is, for this group of assorted persons to stand around in the darkened streets outside a house and sing with their unprofessional singing voices. A woman came out of the house cradling her dog like a baby and just watched them, like she might watch her TV. What a weird thing! The neighbor also popped out, while talking on the phone, possibly telling someone about weird things happening in his neighborhood.
I wonder what other extremely common things I've managed to never see in person.