I don't know if you're familiar with the term "Narcolepsy". What It boils down to is pretty much, the individual with it is not capable of controlling when it goes to sleep. Where ever it is, it just drops. 

That being said, here are a few videos, that I find quite humorous. These videos are of two Daschund's , Rusty and Cocoa, who have Narcolepsy. I don't know whether to feel bad or laugh when they drop like a log. What'd you think?