What are some things passive Perception would notice?

What are some things passive Perception would notice? – Goblins lurking in the bushes.
– A tripwire stretched across the hallway.
– A growing shadow on the ground as a massive boulder falls closer and closer.
– A pickpocket lifting your coin purse.

— Dan Dillon 👥 (@Dan_Dillon_1) January 28, 2020