As far as holiday stories go it's a pretty good one.
On Sunday Auckland man Sam Jupe and some friends were nearing the end of a day's fishing charter when they spotted a humpback whale that appeared to be in distress.
What followed was incredible.
Not only did Sam spend close to an hour battling to save the whale with nothing but a blunt knife, but his friend Andrew Norris managed to take photos for proof of the amazing effort.
Watch the video to check it out.