I actually did it to a Dell laptop about 4-5 years ago. Somehow I got the power cable tangled in the office chair I was sitting on, and when I moved the chair the laptop fell to the floor. Managed to put a small crack in the body, although I didn't notice any other damage, and everything appeared to function fine after that. Never bothered trying to get it fixed, I just lived with the crack for a few more months until I got the laptop replaced (for completely unrelated reasons – I moved to a different team at work, and members of my new team were eligible for beefier machines than my old team were.) I was lucky, could easily have resulted in much worse damage than it did.