A while back, I had had a very bad day with my snakie, and among other things, she too fell about 3 feet or so to the hardwood floor. I felt totally horrible at myself, even while thinking of snakies I have seen out on the woodpile who have scurried kamikaze-style off of the pile when I approached.
My snakie was fine, and is fine to this day, and I'm sure yours will be fine too. There prolly are freak accidents, but luckily you nor I haven't experienced one yet.
Best we can do, is to do our best after all, some people drop their human (kids) too.