Electric sewing machines run at variable speeds, constantly slamming the needle up and down. Careless handling can easily lead to severe injuries, which is why you should follow these tips: -Always make sure to focus your attention entirely on the task at hand. -Never put your hand within a finger's distance of the machine while sewing. -Make sure you remove the pins or replace them with clips, as sewing over pins can cause the needle to snap and shoot off dangerously. -Besides these, also follow other relevant safety guidelines while handling electric equipment, such as not folding the power cord too much or preventing the machine from overheating.