This is EXACTLY what crippling lifelong nightmares are made of.
A guy in Pulaski, in upstate New York was asleep a few weeks ago when, suddenly, a six-foot BOA CONSTRICTOR fell through his ceiling and landed on him. I assume he woke up, realized it WASN'T a dream, and called 911.
It turned out that the snake belonged to the people in the apartment above him, and it managed to sneak through the floor. Neither the guy nor the snake was hurt . . . BUT STILL.
(Here's a picture of the snake.)