It could mean he has eaten 2 slices of the pizza already.
It must mean he thinks that the pizza is not good.
It might mean he wants to eat 8 more slices of pizza.
It may mean he had a new idea and wants to share it with you.
It could mean she is greeting you because she knows you are a tourist.
That probably means she is allowing you to take pictures of that ceremony.
Perhaps it means she is telling you that you are doing a good job at taking pictures of that beautiful moment.
It might mean she is insulting you because taking pictures of a religious ceremony is disrespectful.
That probably means he forgives you.
It could mean he is insulting you because you were rude by bumping into him.
Maybe it means he finds you impolite.
It might mean he is waiting for a more appropriate apology.
Perhaps it means he didn't understand what you said.
That probably means he is asking you to wait a moment.
Maybe it means he is asking you to lower your voice.