When the pressure camber started rumbling along and I heard three pops, I was picturing fresh delicious Yakima corn floating in the aluminum tinged water at the bottom of the pressure canner. Admittedly, I got desperate for a few mire jars and used 3 jars that a friend gave me ( thanks j!) that looked like they had probably been around since the depression. When i hward the rattling and then the pops I immediately thought--I've learned this old jar lesson before! But, after the pressure canner cooled and the dial read zero, the smell of corn was so strong I was sure my pot was full if shards. But no, all jars intact, looking good. I guess the smell is just corn juice siphoning off...phew! I've got 10 pints of delicious sweet corn.