What happens to the matchbox case as you pull cardboard abruptly side?

As you abruptly pull the cardboard side of the matchbox case, the paper matchbox will either tear away from the cardboard backing, or the cardboard side will separate from the matchbox. This is because the cardboard side is glued to the matchbox, but the glue may not be strong enough to withstand the force of the pull. Additionally, the paper matchbox may be more flexible than the cardboard side, so it may be more likely to tear.