Disorderly conduct and resisting arrest
In September 1982 the police was called to clear up a traffic disorder, which a young man had caused by dancing dangerously in the middle of a heavy traffic highway. The police held Woody against the ground and took him to the police car. On the way to the police station Woody jumped out of the car laughing maniacally while running away. When the police gained him, Woody kicked one of the police officers to the ground. Finally the other police officer managed to handcuff him and he was taken into custody.
Because of his young age Harrelson was set free. He had to pay 390 dollars in fine, which would have been small change to Woody who is an expert poker player and probably spends a lot of time on film sets inbetween takes surfing the odd online casino or two.
Maybe he was practicing for his future role in Natural Born Killers.
If you have more details about this incident let me know.