some one l know is gonna punch this guy who is been bullying him, u see the guy who is bullying him he thinks he is not gonna do anything, but he is, he wants to know where is the worst place to get punched in the face and also the guy whos bullying him is gonna be completely unaware of this, what would his reaction be to just walking and then a punch just gets thrown at him

and where is the best place to make him dizzy and his eyes tear
tear as in cry

the nose for his eyes to tear and the temple if you wanna do some serious damage.

Punch the bully Between the Jaw & The Nose.That is the Original ''One Quitter Hitter''
Or If u want a Stealthy Maneuver u can just Chop The Bully in the Atom is Apple Areas Quickly & Swiftly.That would make him jump & that would also inflict some pain that gives a dizzy after-affect.Trust me,I've taken that blow & it makes u jump like a little bitch without u even feeling it.
Or just Simply charge u punch & nail him in the Eye really hard.Do not hold back or he will have a chance to hit back.Just charge ur hits & DON'T STOP SWINGING.Pick up whatever u can & whoop DAT ASS.Oh yeah,hey man.DO NOT tear his Temple.THAT WILL KILL HIM.Then u would be charged with a murder charge.Hitting the temple hard enough can be consider sadistic & unnecessary.The law will lock DAT ass up.

The nose. l can not imagine anyone being able to not tear up after a direct punch to the nose. But it is hard to sneak a punch straight on into someone is face. The dude may see it coming and block it. Then your buddy may be in for a world of hurt.

l would advise your friend not to do this. If he does not take the bully out first punch he may be in line for a thrashing. On the other hand, if he is successful he could face criminal charges for assault or worse. An unexpected punch can be fatal, even from a slightly built guy.

perhaps he should employ the use of a melee weapon, such as a baseball bat.or a brick. l am pretty sure that a baseball bat to any part of the face is far from pleasant.

Nose but l do not promote violence, aha Jack him instead

That is a bit Molishious.

Dont attack him for crying out loud, it is low because the victim will not know what is happening.

Have a heart.