I get sleepy after sessions. After most sessions. But after very emotional settings I sometimes have to take a short nap in the car before driving. I figure it's my brain's way of resetting to normal every day mode. If I manage not to sleep immediately, I often end up napping later anyway and often get a headache to boot.

When I wake up from those naps, I'm generally a lot closer to my normal work or home state of mind. I call them forgetting sleeps. Though that doesn't always actually mean forgetting.