PDX Porch pirate gets box of cat poop

[Mike_M57]

"and then rig the box with a razor blade that would cut the bag open when the box was opened."

For the life of me I can't envision the mechanism that would do this.

He tried to explain it to me, but I had trouble understanding it, too. As I remember it was a telescoping-type box , rather than a flap-style , and he rigged it to cut open the bag when the lid was removed. It's been 40 years, so the memory is about as fuzzy as Bigfoot's behind.