In Yellowstone there are a lot of Grizzly bears. We saw a movie how to behave at a encounter with a bear. 10 days before, a friend was in the park and saw a grizzly 10 meters away.
After discovering that hikers are 1000 times less than the ‘normal’ tourists, I thought that the probability of getting injured by a bear, increased by 1000 times.
I didn’t know any statistics. So walking alone whole day, with an expired bear spray, made me a little tensed. We were making noises when the trail was making a corner. We tried to camp before the sunset.

We cooked at a certain distance from the sleeping place, we hanged the food on a horizontal pole at 3 meters height. No water, hygiene stuff in the tent.

One day we could not find the camping site, because the marking was very bad. We decided to walk to the next one. So we arrived pretty late. Emilie was preparing the dinner, I was at the river trying to heal my feet wounds, when I heard a noise like a thunder, or airplane, from the forest. I ran towards Emilie, she heard as well. We started to shout and later to speak louder. I am not sure that it was a bear, but we got our dose of adrenaline. Next day I found that the site was not very clean, there were some rests of food.
Overall it was a thrilling experience, somehow I felt as a pioneer. We crossed big rivers

Here the cloud passed so fast that I didn’t have the time to change the camera to video mode

The last day, we were walking in the woods, but out of the national park. After several days of seeing no wildlife, I was almost wishing to see a bear. Turning a corner on the path, I saw through the leaves a brown thing. I realized very quickly that’s a horse, but my danger channel of brain already released the adrenalin. And the poor horses were scared by the noise I made with the sticks.
10 days later, a hiker was killed by a grizzly, in an area where we could have been, but we spent the day with a family.

Later I discovered some statistics
http://www.nps.gov/yell/learn/nature/injuries.htm