Tim Greenway/Staff Photographer — Brian May of Lisbon performs a backflip during warm-ups for the big air competition at the Biddeford Big Air and Rail Jam competition in downtown Biddeford on February 1, 2013. The contest featured professional snowboarders and skiers competing on a 30-foot tower and snow covered ramp. The event Friday night kicked off the second annual Winterfest which runs through the weekend and features free events including sledding on a man-made course on Adams Street.