Rear wheel cylinder blew out on the way to work today

My moneys on the line where it goes into the cylinder. You should check ALL steel lines VERY carefully and replace all that show rust. I'd also look at the rubber hoses too, the way to check is to flex them by hand and look for any cracks. Any signs of cracks, replace the bad hose. I now buy the coated steel line, then bend it into shape, then paint it silver... It seems to last much longer up in the NE here that way. I've lost lines on my old Omni, my Neon, and my truck, and the '65 blew out literally driving out of the storage bay...