Testiment to how good they and their waterproof cases really are.
So far mines been through a bush and dropped several times and covered in snow. All without its case.
All thats happened was when it was covered in snow, it shut down mid flight, i turned it on at home an hour later and it worked fine.
Its expensive to replace that front lense though, the waterproof casing is worth its weight in gold, even though its relativly light