Clockwork monster novelty in matchbox joke

The matchbox looks normal, but it has no bottom. When you pick it up, the monster that is underneath comes to life. No longer constrained by the matchbox, its tail is able to spin round at high speed and the monster twists and turns at random in a frightening way. It needs plenty of space because you will never know where it will go. The bottomless matchbox with the monster and key inside was supplied in a cardboard sleeve.