10). A porta-potty forgotten for 2 years. —SamuraiCat

9). The stuff in the bottom of your pack from the last camping trip...raisins with fur? —wm morrison

8). A republican — Donald Hoebeke

7). A tech hiker armed with the GPS and cell phone, but no map and compass! — Mike Lafleur

6). Finding out you just wiped your behind with poison ivy. — SamuraiCat

5). Poachers — bears25

4). "No, I though YOU brought the toilet paper!" — Ed Berkowitz

3). The sight of someone reacting to a bee flying nearby. —Lamont

2). Your own imagination! — Strawberry

1). Hiking with a lawyer and a defective map. — Ed Berkowitz