"It was surprising what happened. A lot of people will be crying and feeling sorry for him.''
He said arrangements were being made to send Mr Christian's body back to New Zealand.
The death of the friendly, popular local would affect the whole community, said fellow yachtsman and Vanuatu Cruising Yacht Club committee member Sam Bell.
"He was a well-liked person in the community. It's a real shame for Port Vila.''
Mr Christian had gone to club Planet 107 with the woman and a group of female friends, when her boyfriend showed up and became angry, said Ms George.
"That guy he came and tried to talk to his girlfriend and had a fight with her. The man has come to help the young girl and he tried to separate the girl but the local guy fought back.''
The Kiwi man was taken to Vila Central Hospital but later died.
The other man involved was in custody and police were speaking to witnesses, said Ms George.
The Ministry of Foreign Affairs and Trade said it was aware of the incident and the High Commission in Port Vila was helping Mr Christian's family.