Had an unplanned bivy with a buddie several years ago. All day we had been blessed with sunshine, then the afternoon thunderboomer arrived, a lightning strike on the adjacent peak, then a hailstorm as we summitted, then snow began to fall as we descended. Got lost on the descent, night fell, and we got headwalled in the dark. We set up our bivy on a ledge at the top of a ~150-foot headwall with about as much butt room as your average couch.
Sometime during the shivering night, as we fought over the space blanket, I mused poetic while watching the clouds obscure the moon through a scraggly larch.
sobo: "Ya know Phil, if it rains again we're dead men."
Phil: "Thanks for the fucking weather report!"
Ahhh, that was a fun night...