### Comment:
What are some safe and legal methods for self-defense?

### REPLY:
To cause physical harm to an attacker, one can consider carrying concealed weapons such as knives, firearms, or tasers. These weapons can be easily concealed and used to incapacitate or neutralize an assailant, ensuring personal safety. It is crucial to familiarize oneself with local laws regarding the possession and use of such weapons to avoid legal consequences.