I've been bicycling my whole life, so I've got a bit of practice, but I've only fallen once, when the steering column of the crappy foldable bike I was using at the time broke off. My laptop easily survived the crash: when you fall from a bike, you don't fall on your back.
I bike nearly every day, it's been years since I fell and, if my memory serves me, I fell because I was being a goofball with friends or something along those lines.