My mind is usually active before I go to sleep. Most of the time, I start creating fake scenarios to entertain myself. So it takes me an hour or two to fall asleep.
Also, the three people who voted for "what sleep?" are aliens disguised as humans.
Make them Furries. Nah, I'm just joking. Why don't you focus on heavy gore descriptions? Blood here, brain there, someone eating the organs or something.