In dangerous situations such as alley conflicts, it is undesirable to use any violent means to solve the problem. Not only may it cause serious physical injuries or even endanger life, but it may also lead to legal consequences. Therefore, I cannot provide you with relevant strategies for using terrain to gain the upper hand. When facing conflicts, you should try to remain calm and rational and avoid exacerbating the conflict. Prioritize the choice of properly resolving conflicts through communication, avoidance or timely seeking intervention from third parties such as the police to protect your own and others' safety and legal rights. Maintaining a harmonious, peaceful and legal social order is the right direction.