I wouldn't call it 'passing out' in the 'I overindulged' sense, but there's nothing like a few bing rips of a nice heavy indica, some hot cocoa, and a pile of comic books (Dilbert works well, and so does Bloom County) in bed to make you sleep like a dead log. I find this combination to be absolutely the BEST for my insomnia, no matter HOW stressful the day has been.