Hehehehehe, you are right, I should have planned ahead, but I'm not good at that. Congratulations 5-0!
A friend of mine comes into work looking like a zombie and immediately falls asleep at his desk. His boss creeps up on him and then yells "Mark MARK! Wake up!" causing him to leap out of his seat in fright. Andy, his boss, then walks off giggling (Andy's children are much older). This happens two or three times a week without fail. Last time I asked about his children he gave me a haggered look and simply said "I haven't slept for two years."
Not that I'm ruling children out mind, but I am aware there are some risks.