Microwaving a spoon with food can be dangerous and should be avoided. Metal objects, including spoons, can cause sparks and potentially damage the microwave oven. Additionally, the metal spoon can become extremely hot and cause burns if touched immediately after microwaving.
As for the food, it is unlikely to become toxic solely because it was microwaved with a spoon. However, if the spoon causes arcing or sparks, it can create small holes or punctures in the food packaging, which may lead to uneven heating or exposure to harmful bacteria. In such cases, it is best to discard the food to ensure your safety.
After the incident, you should examine the microwave for any damage caused by the metal spoon. Check the interior for any signs of burns, charring, or damage to the walls, turntable, or other components. If you notice any significant damage, it is recommended to have the microwave inspected or repaired by a professional before using it again to ensure it is safe to use.
In general, it's important to exercise caution when using a microwave. Always follow the manufacturer's instructions and avoid placing metal objects inside the microwave to prevent potential hazards.