One morning Jill Taylor woke up with a headache, and as she went through her morning, she watched as her brain functions slowly stopped working until eventually she realized she was having a stroke. A blood vessel ruptured in the left half of her brain, and as that side of her brain shut down she was temporarily able to observe the world with only her right hemisphere.
This is an amazing presentation.
18 minutes. Link to Video
Her book: Jill Bolte Taylor | My Stroke of Insight