If your jumping on a trampoline over at someone elses house (ed note: also known as trespassing) barefoot make sure you watch out for those traingle shaped hook attachments. Jumping on one can cause some major bleeding!
This is a tip for those who might run where giant swarms of gnats sometimes loiter by the side of the road. This tip stems from a run on the Mayan Riviera in Mexico, but I've encountered swarms of gnats in Virginia and Kentucky as well. After your run, always stop and look in a mirror before going into public. Otherwise, you might actually complete a transaction at the resort store and greet five people before realizing you have up to 15 gnats stuck to your face and neck.