Petrified young teenage boys digging their own graves and a mock execution has been outlined to the inquiry into abuse in care on Friday.
The abuse survivor has name suppression.
At the age of 15 he was sent by Social Welfare to the Whakapakiri Youth Trust on Great Barrier Island.
He said it started out like Tom Sawyer's adventures but soon turned to Friday the 13th horror.
After a few days four of the boys, including him, were marched off during the day to a site near the camp and ordered to dig.
''The supervisors told us we were getting executed and we've got to dig our graves.''
He said the graves were quite deep. ''At least two or three feet deep.
''We were told to get in the graves face down and we were going to get shot.''
He said once they were in the graves the supervisor started shooting.
''We all just came flying out of our grave. We were all just trying to get out of it. He was just kicking us back down into the grave and stomping on us to get us back in the grave and face down.''
''I was petrified, we all were. We were just screaming, screaming for our lives.''
He said they did not know if someone had been shot or who was going to get shot next.
''This guy was wielding his gun around and shooting it and I mean we just couldn't help it and tried to look out of the hole if it was you being shot at or someone else.''
Eventually they were allowed out of the graves.
''We were all just traumatised at that point and I think we were just happy to be alive too.''
He was at the camp for a month and on the last day the same supervisor raped him in a cabin.