I don't get it. What are the rules to write a correct one ?

A lip that inflates
Bloody teeth out of the mouth
My fist in your face

Am I doing it right ?

The first line is preferred to refer to one of the seasons, or it may be a natural scene. Not a thumb rule in western haikus, but adds a challenge if you accept. :)

All the seasons pass
Waiting for Planetside is
Heartbreakingly fun.

The last line often adds a new layer to the picture built in the first two lines - it is often contraversal, or gives a different aspect of meaning.

Fallen leaves rot
At my feet. So will our lives
Wait for the respawn.

(english is not my native, can make much better in hungarian. :) )