["a werewolf attacked my sister two days ago". he supposes that would only count as a crisis for himself, though]
To quote one example, a costume party was thrown, and half the people in costumes experienced sometimes drastic personality changes for the duration of the night. Several people were hurt. To quote another, one time many of us lost one or more of our physical senses for an entire day.
In both incidents, an outside force interfering with the system was indirectly responsible. But it just drives home that a system this powerful can do pretty much whatever it wants to us.