Is that geeoteen or gilloteen?

My oldest daughter came for the Memorial Day picnic and noticed her adored youngest brother sitting peacefully in the driveway lining up dandelions. As she approached he started decapitating them one by one with a discarded lawn mower blade. He spied her coming and asked, "Ked, do you really think the guillotine (perfect French pronunciation by the way) was a more humane way to execute people?"