Open Loop Back Flip Challenge! by Scotty Cranmer. The 2019 Swampfest BMX event is right around the corner and we are getting ready building our obstacle course and all the channel crew are showing up at the airport and we have special guests arriving all day long! We all went to ride the ramps and all the guys decided to have an open loop back flip challenge and things got pretty crazy! This is the before video and the next video will be the obstacle course challenge!