A mikva with very little water in it and a sign saying it was closed
to prevent the spread of a mafia infection that was going around.
Being at a Shabbos seuda (I think) hosted by a certain (non-Jewish) podcaster, with
his wife talking about how she'd been an actress for 12 years and not gotten paid.
Having a crocodile in my backyard. It was supposed to be there; the child
wasn't supposed to be in there trying to run away from it, and I told the
other nearby kids about how dangerous a thing this was to do.
When I reached what I thought would be the scene of the crocodile having
injured or killed the child, there was instead a child playing near a lion.
That got me to realize I was dreaming. I ran into my house and started calling
out about my being dreaming before quickly realizing that if I was dreaming,
other people weren't real and there was no point in telling them anything.
I then considered playing a solo game but realized that any
card I drew from a deck would be made up by my brain.