Like any sensible outsider, National Hockey League Referee Frank Udvari knows that it's best to keep clear of a family fight. One night last week during a furious set-to between Jim Norris' Chicago Black Hawks and his brother Bruce's Detroit Red Wings, this year's Stanley Cup finalists, Udvari found the ice too hot for a stranger and took prudent refuge on top of the boards (striped shirt, right). The Detroit team went on to win this particular round of the family quarrel to tie the playoffs at 2-2 but at week's end the best-of-seven series had been taken by the Hawks.