Reminds me of a couple of true stories which I think I posted before but worth repeating
Back in the 60s my caving club had done and expedition to Yugoslavia as it then was. They were camping in the mountains and had been warned there might be bears. A pal of mine and his mate were sharing a tent and were woken up in the night by scratching on the tent canvas. Naturally they were more than a little concerned but eventually the other guy was so freaked out he got out of the tent to investigate. It turned out they'd camped on some kind of toad migration route and the toads were hopping along, climbing up the side of their tent and sliding down the other side. In reality the chances of actually seeing a European bear must be pretty low, and I suspect they are far more likely to run off than attack unless you bothered their cubs or whatever
Another story from a friend of a friend doing geology field work in Greenland and a polar bear sat on his tent and he cowered in the corner until this bear's arse shaped bulge got up and wandered off. Polar bears are obviously a far more serious matter to say the least. Anyhow he got away with it