Last rolling "SNAFU" was a blowout on my 70'ish Torpado, rear tire blowout about 1 1/5 miles out. Had just pulled over and turned around to head home because the silly Itallian BB fixed cup had started backing itself out (I noticed FD chain rub and Crank felt sloppy)....BANG!!!! The old 27x1 1/4 slipped off the straight walled Weinmann Rim and let the tube escape...the tube in turn, let 75 PSI of air escape...5" tear in the tube...ummm, NOT patchable....