Cotton Kills

Wearing clothes made from cotton is great for hiking, but when it gets wet it can become a major problem. Because cotton absorbs and retains water very well, it can become abrasive leading to blisters and sores. Plus, when the temperature becomes cold, wet cotton will sap your body temperature which can quickly lead to hypothermia.

Killing flies

To killl a fly with your bare hands, clap them together over a fly. They'll see motion and fly upwards to escape, only to fly right between your enclosing palms.