In the National Forests of Alaska, a tourist guide was addressing a group of vacationers about the dangers of hiking in grizzly bear territory. He warned: "Most bear encounters occur when hikers, being extra quiet along the trails in the hope of viewing wildlife, unexpectedly stumble into bears. The resulting surprise can be disastrous. To avoid this, we suggest that hikers should wear tiny bells on their clothing to warn the bears of their presence. Finally, exercise added caution when you spot signs of bears in the area, particularly when you see bear droppings."

One tourist asked: "How do you identify bear droppings?"

"Easy," explained the guide. "They're the ones with all the tiny bells in them!"