How, what, when, where but not why

A 32 year old woman made headlines recently when she jumped into the pool of a polar bear enclosure at a zoo in Berlin, and swum towards the bears. There are photos of her doing a calm breaststroke up to the animals, and then another of her screaming in pain as they inevitably mauled her. She was rescued and will need several operations to mend the wounds. But the key element missing from this news story is motive: was she mad? Stupid? Naive? Or was she suddenly gripped by the realisation that life is too short to see polar bears without touching them?