That would make you the aggressor.
Can you hit someone if they spit on you. Can you hit someone if they spit on you in the US. Second you can only punch someone if theyve already taken a swing at you or if you believe youre about to be hit. Maybe you have some things on you that you can then in.
A common Stock Phrase and a Tempting Fate trope. Dont try this unless you need to knock someone out in self defense or you are being supervised by an experienced coach or trainer. Its hard to argue self-defense when youre literally on the attack.
Though the risk of transmitting HIV through biting spitting or sharing of sex toys is negligible at least 11 states have laws on the books criminalizing potential HIV transmission through such acts. Spitting on someone is considered battery in a civil context not necessarily a criminal charge. If the spitter was sick or had some kind of virus and tried to spit at you in the eye or any other mucous-related orifice of your body and such was done WITHOUT YOUR CONSENT this can be considered ASSAULT.
You can either get an order that prevents the person from engaging in specific actions or one that requires the person to stay within a certain distance from you usually 50 100 yards. Whenever any fictional character tries to invoke this the odds are pretty good that hes about to get hit. Upholding the conviction the Court of Appeals found that spitting in the face is within contemplation of the Federal assault statute.
If youre not comfortable trying to trap and strip a weapon from someone than you want to kind of adapt to your environment improvise. The usual reaction is the attacker will immediately pull the glasses off and then sock his opponent but other variations are not unheard of. A crime involves the legal theory of a mens rea which means criminal mind or having such a state of mind while committing an act.
Once the airway is cleared parts of the object that caused the person to choke can remain behind. Look to see if there is something blocking the airway. However the situation might not be so cut-and-dry.