Alexander Tuiritekoau Davey, 17, pleaded guilty to one charge of common assault, one of wilful damage and one of breaching his community work order in the Blenheim District Court yesterday.
Police prosecutor Sergeant Graham Single said Davey was walking with an associate on Scott St about 2.30am on September 22 after leaving a party.
As they were walking they approached another group and words were exchanged between the groups.
He became enraged at one of the men in the other group who was talking in another language and grabbed him by his clothing before the victim managed to break free and run away.
Davey began chasing him and followed him to a property, where the victim went inside and shut the door.
When he arrived at the property he looked through the window and saw his victim standing with his back against the door and punched through the glass, cutting his own arm.
In explanation to the police Davey said he chased the victim because he was angry and very drunk.
Judge Zohrab said Davey was beginning to accumulate a "bit of a history very rapidly".
"I'm concerned that you're still very young and you're getting a whole lot of dishonesty charges in a short space of time and now you've got an assault," he said. He sentenced him to 300 hours' community work.
Jason Douglas Patterson was remanded without plea on three charges when he appeared yesterday.
Patterson will reappear on one charge of common assault, one of wilful damage and one of breaching a protection order on December 9.
- The Marlborough Express