It is a foul. The foul line extends all the way down the lanes, to the walls of the building and up the wall of the building. If any part of your foot cross that line anywhere and makes contact past the foul line, it is indeed a foul. If your foot or hand crosses the line and touches the lane or gutter cap past the line its a foul, and if your hand/foot touches the side wall of the center past the extended foul line it is a foul
Edited by The Dreaded Durbin on 1/28/2011 at 4:24 PM