Here’s something I didn’t know was possible until it happened.
Apparently, if you have a can of soup, and some part of the soup had gone off or was rotten when it was canned, it can ferment inside the can and expand. Eventually the pressure will cause the can to open.
When the can opens it will be spectacular, in a horrible sort of way, looking and smelling like someone has projectile-vomited across your kitchen cupboards. It will literally explode.
We emptied the cupboard and cleaned it three times to get rid of the smell, and then found the lid of the can several days later. It had blown off the right side of the can, bounced off the wall of the cupboard, and landed between some other items in the far left corner at the back.