In a tense and suspenseful story, characters can use a variety of clever methods to quietly injure themselves or others. Here are some common methods that are suitable for plot development: 1. **Poison**: - **Highly concealed**: The character can mix poison into food or drink, and the target is poisoned without knowing it. - **Slow-acting poison**: Use a slow-acting poison to delay discovery and increase suspense. 2. **Asphyxiation device**: - **Plastic bag**: Easy to obtain and used secretly, such as quietly placed in a sleeping environment. - **Cyanide gas**: Released through a special device, it is quickly fatal and difficult to track the source. 3. **Hidden sharp weapon**: - **Invisible knife**: Such as folding knives and needle-shaped guns, which are easy to hide in clothing or everyday objects. - **Rope or filament**: Used for binding or strangulation, suitable for quick action in a small space. 4. **Mechanical device modification**: - **Household appliances**: Modify appliances such as coffee machines and electric kettles into deadly weapons, causing harm through high temperatures or electric shock. - **Vehicle modification**: Adjusting the mechanical parts of a vehicle, such as the brake system, to create an accident. 5. **Psychological manipulation**: - **Mental stress**: Using threats, intimidation, or emotional manipulation to cause a mental breakdown or self-harm in the target. - **Misleading information**: Spreading false information to induce the target to take harmful actions. 6. **Environmental hazards**: - **Gas leak**: Deliberately destroying ventilation systems to release harmful gases such as carbon monoxide. - **Structural damage**: Such as destroying building structures at night, causing landslides or other disasters. 7. **Biological means**: - **Infectious diseases**: Deliberately spreading diseases and using pathogens to create panic or harm. - **Poisonous animals**: Using trained animals (such as snakes and spiders) to attack. 8. **Electronic interference**: - **Electroshock devices**: Hidden in common items and triggered by remote control. - **Electromagnetic pulse (EMP)**: Paralyzing electronic equipment, creating chaos or isolating the target. 9. **Hidden kidnapping**: - **Secret room**: Setting up a hidden space in a residence to kidnap or imprison for a long time. - **Disguise tools**: Use common items such as suitcases and handbags to disguise equipment or weapons. When using the above methods, it is important to ensure that they are reasonable and logical in the storyline, while avoiding describing the implementation steps in too much detail to maintain the tension and suspense of the story. By cleverly using these means, you can effectively promote the development of the plot and enhance the reader's sense of involvement and tension.