Forget the knife unless you have time to train with it. Most gang type, and the local once as indicated by your friend's beating, are familiar with weapons.
Stabbing with a basic folder is a good way to slice you own hand up. Stabbing is also not real good for stopping someone. On the other hand it is far more lethal than slashing.
Slashing is generally safer for an untrained person. It is harder accidentally cut your self. It takes less practice and aiming. Slashing is much better at stopping aggressive movement.
For that type situation, I would really tend more towards a nice oak or hickory walking cane with a triangular cross section. It is always at the ready, most people don't recognize it as a weapon, it is heavy, and the sharp angles both cut and cause blunt force stopping trauma. finally it is also handy for when you are running away. It is much harder to dodge a spinning cane thrown at you than a small knife, when you are chasing some one.
Stabbing with a basic folder is a good way to slice you own hand up. Stabbing is also not real good for stopping someone. On the other hand it is far more lethal than slashing.
Slashing is generally safer for an untrained person. It is harder accidentally cut your self. It takes less practice and aiming. Slashing is much better at stopping aggressive movement.
For that type situation, I would really tend more towards a nice oak or hickory walking cane with a triangular cross section. It is always at the ready, most people don't recognize it as a weapon, it is heavy, and the sharp angles both cut and cause blunt force stopping trauma. finally it is also handy for when you are running away. It is much harder to dodge a spinning cane thrown at you than a small knife, when you are chasing some one.