Bricks and wood can be used to strike with. An opponent can be thrown against sharp pointed gates, railings and walls, etc. You can even drive over your opponent. Stones, sand, coins, iron balls. You can attack also by using your cellular phone like a stone.
Any aerosol can, hair spray, spray paint, pepper, tear gas etc.
Due to the awareness of violence, people take it upon themselves to carry illegal self-defense weapons. These weapons are usually quite obvious and even though they may successfully ward off attacks, they can bring a lot of legal difficulties for the user. Many very effective, perfectly legal weapons which still produce the same results, may be carried instead. At any one time people unconsciously carry many potential weapons. For example, belts may be used as a garrotte or a whip with the buckle, coins may be thrown into the face of an opponent to stun and blind him, clothes may be used to whip, ward off attacks, choke and obscure vision etc.