Acid 
To dream about acid means that you should be careful about making commitments or be confident about the commitments of other people. An acid dream can also signify that you are quite mad at someone.
To dream about drinking acid signifies that you have strong feelings that need to be expressed. If left inside, they can be harmful.
Pain
To dream of experiencing pain is a projection of self-inflicting pain. You are blaming yourself due to an instance that had blown out of proportion or a problem that you are unable to control.
The dream of pain may also be a true manifestation of bodily pain or a health problem.
To dream of self-inflicted pain indicates some overwhelming problems in real life which you are trying to disconnect yourself from. You choose to bear the pain due to guilt.
Punch
To dream you are punching someone or something signifies latent anger and aggression. It also symbolizes power and inner strength.
To dream you are unable to throw a punch suggests you feel defenseless. You may suffer from lack of self-confidence and low self-esteem.
To dream of drinking punch signifies vitality and renewal.
Hand Grenade
To dream of a hand grenade indicates that you may be about to give someone some information that you have been guarding. Although you may feel that it is right to say what you know, you might need to examine your motives and the consequences should you tell. To be holding the hand grenade symbolizes a personal desire for drama and the ability to achieve it, but at a high cost.
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