Ha! Kidding of course. Panaracer Paselas are a very good starting point. I've never yet flatted one of 27 x 1 1/4 (or larger) size, and not for lack of trying. I abuse my tires viciously, and at high speed. I've had terrible luck on the 28 x 700c size (and smaller), but that's probably just because I'm too fat, ~200 lbs.
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● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●