As the bus was at a red light, he quickly opened the front doors and rushed to the boy's aid.
The vendor demanded that he pay for the meal despite the mistake, which made him angry.
The 60-year-old driver is assisting with police investigations.
This marks the first time that researchers have used such cyborgs in a humanitarian mission.
The victims had no prior connection with the attacker.
The blaze may have been caused by equipment failure, HaveFun Karaoke reportedly said.
One of them took out a bag from the car before fleeing.
Brown liquid was reportedly coming out of his mouth when he was discovered.
The car was seen attempting to cut across the chevron markings to get to the slip road.
The policy aims to prevent the exploitation of personal connections to extract intelligence.