Non-verbal and Verbal

One time when some waved at me I thought they wanted to talk, but really they wanted nothing to do with me they just wanted to be nice and wave.

You could always wave, shake hands, and nod your head to say hi or goodbye. There are many things that can be non verbal in everyday communication. Also many things can go right and go wrong in non verbal communications because you could take something the wrong way then whats its supposed to mean.
Non-Verbal- sending and recieving wordless messages.

In verbal communication you talk to people other then use non-verbal and dont talk to them. Nothing can go wrong in this situation because what ever you say is what goes.
Verbal- its for people to communicate face-to-face.