Powers says he ran to find the man with his legs under the slab, but there was little he could do.
"He asked me to try and help him pick it up," Powers recalled. "But I mean, you know, I ain't Superman that thing's really too heavy to pick up."
He did flag down a passing ambulance.
"Three or four ambulances and three of fire trucks came," Powers said.
The New Orleans Fire Department described it as an "almost 1-ton concrete slab."
"According to the victim, he had stopped to urinate when the barrier, which had been stacked in front of him, fell over pinning his legs to the ground," explained NOFD Captain Edwin Holmes, Jr. "Fire Rescue crews used airbags to lift the slab approximately 18 inches off the ground to remove the victim from beneath."
"The previous days' heavy rains had softened the ground, causing the victim's legs to be pressed into the mud as opposed to being crushed. Five NOFD units carrying sixteen firefighters along with EMS crews were used to bring this incident under control at 4:56 a.m. The victim was transported to an area hospital with a broken ankle," Holmes said in a news release.