BEHIND THE 8 BALL Sports heroes Terry Bradshaw, Jimmy Johnson, Reggie Jackson, and hockey player Jay Pandolfo shot some stick at Felt over the weekend, while elsewhere in the upscale pool hall, original "American Idol" runner-up Justin Guarini celebrated his 26th birthday. (Guarini's party was organized, and attended, by his spiritual adviser Azra Shafi-Scagliarini, who's also counseled Britney Spears, Duchess of York Sarah Ferguson, and the Yankees' high-priced bench-warmer Jason Giambi.)