It is strangely artistic the way his brains are painted across the pavement. I can picture four guys holding down the victim as he screams, begging for his life. Two more guys hoist the concrete slab over the head. The victim is rigid with terror as he realizes that they are dropping the massive rock on his head. The cranium bursts open like a watermelon that was dropped. The victim is instantly unconscious as his brain is sprayed in all directions. The force of the impact shatters bone and the stone slab at the same time.
Apart from the terror of expectation, this was a really nice way to off the guy. Most old people who die in the hospital will have far worse done to them.