Tim Greenway / Staff Photographer

Brian May of Lisbon performs a backflip during warmups for the big air segment of the Biddeford Big Air and Rail Jam competition in downtown Biddeford on Friday. The contest featured professional snowboarders and skiers competing on a 30-foot tower and snow-covered ramp. Friday night’s event kicked off the second annual WinterFest this weekend featuring free events including sledding on a man-made course on Adams Street.