Years ago I watched an Aby named Squid get the tag on his collar caught on the handle of a toaster oven. He dragged the oven across the counter and into the sink where it finally pulled hard enough to break the "break-away" collar. There was an open can of cat food in the oven - supposedly hiding it from him - and he was trying to get at it. That stopped after this event but he learned how to open the oven and did so frequently to see if there was any food in there.