Torsion springs are coils that are twisted (rather than pulled) to store energy. Large coiled torsion springs are used to counter-balance the weight of garage doors. Great care must be exercised when adjusting these as they store a large amount of mechanical energy. Small coiled torsion springs are often used to operate small pop-up doors. These could be found in consumer products such as digital cameras, compact disc players, electronic games, and similar.