Seth Enslow set by Doug Danger. He started practicing by jumping ramp jumps over kegs of beer, cars, motorcycle and other big objects at different events. In 1999, he broke Robbie Knievel's (son of Evel Knievel) record for most motorcycle jumps. However, Enslow's triple clamps broke, which disconnected his front end from the frame, resulting in Enslow diving head first into the asphalt. But Enslow was soon on his feet and even signing autographs before leaving the venue. In 1999, Enslow made his first attempt to break the overall record at fellow motocross rider Mike Cinqmars' property with a ramp designed by
Marathon world record progression world record ratification should an application be made." The IAAF recognizes two world records for women, a time of 2:15:25 set by Paula Radcliffe on April 13, 2003 during the London Marathon which was contested by men and women together, and a "Women Only" record of 2:17:01, set by Mary Keitany, on April 23, 2017 at the London Marathon for women only. In order for a performance to be ratified as a world record by the IAAF, the marathon course on which the performance occurred must be long, measured in a defined manner using the calibrated bicycle method and meet