Yes, sticking a metal fork or any metal object into a toaster can be extremely dangerous and should be avoided at all costs. Toasters operate by heating metal coils to toast the bread. When you insert a metal object like a fork, it can cause a short circuit, leading to sparks, electrical shock, and even a fire hazard.
The metal fork can conduct electricity and create a direct connection between the live electrical components of the toaster, resulting in a potentially life-threatening situation. The toaster's design is meant to accommodate bread slices and other non-metallic objects, but anything metallic should be kept away from the toaster's openings.
If something gets stuck in the toaster, unplug it immediately and avoid using any metal objects to try to retrieve the item. Allow the toaster to cool down first before attempting to remove the item with non-metallic tools or your hands.
Always prioritize safety when using electrical appliances, and follow the manufacturer's instructions and safety guidelines to prevent accidents and injuries.