Reach around and hook someone you love, because Interference-Is-Legal day has come again! Every spring, right around six weeks after groundhog day, the NHL rules change overnight and the referees put their whistles where the s... in their pockets. No announcement is made, but the signs are clear for those who know how to read them. So if you see a speedy forward dump the puck in the corner and go after it, squash him against the boards up near the circle. It's OK! (Just don't leave your feet or go after his head -- those are still penalties)