In explanation Watson said "they came at me first" and that it was "self defence".
The officer suffered some bruises and received medical treatment following the attack.
Yesterday, Watson entered not guilty pleas to charges of unlawfully taking a motor vehicle, aggravated failing to stop, reckless driving, two counts of burglary and two counts of failing to stop and ascertain injury.
The charges allege Watson stole a WorkSafe ute from a Hastings address in March and, when instructed to stop by police the next day, failed to do so.
Police also reported the Worksafe ute had crashed into the back of a stationary vehicle at a Hastings intersection, driven through a large amount of wet concrete and struck a car head-on at another intersection in Flaxmere before being spiked while driving along Flaxmere Avenue.
The offender, who ran from the scene, was arrested a short time later and a search of the car recovered stolen items from another burglary that had happened in Havelock North during the day.
The maximum penalty for assaulting a prison officer is six months' imprisonment or a $4000 fine.
Watson is set to appear again in June.