Wobbly matchbox joke

When your target picks up this matchbox from the table, it immediately wobbles in a most surprising manner. The box contains a clockwork motor with an eccentric weight attached. As soon as the box is lifted the motor starts. This style of matchbox was sold by Gus Davenport in the 1960s. John Davenport recalls helping his father Gus fit the mechanical works into the matchboxes, once the matches had been removed.