This just happened to me a couple weeks ago. My dad and I were riding my 4 wheeler 3 miles back to our hunting spot. A tree had fallen down on the trail so I decided to climb the bank on the side of the trail. I hit it in 2nd gear with my dad and our gear on with me. I was almost to the top when he told me to "gas it." So I did and it wheelied straight up and we almost went back down the bank. I managed to get it on all 4 wheels but in doing so I hit my chin on the handlebars and bit my tounge and smashed my teeth together. My dad told me it was good that I brought tiolet paper along.lol. Even with the pain I couldn't stop laughing.