This ocured at the Jackson Lake Dam in Grand Teton. The fracture was MOSTLY to my pride .( A bit to knee and ankle) Wet wader boot/foot slipped off brake and onto gas pedal. The park ranger actually suspected alcohol was involved. After about a $300 or so tow bill, I was merrily on my way again. The truck was actually teetering on one of those big log/barriers. Wheeeewwwww!