A 20-year-old British tourist is reported to be in critical condition after a quadbike crash while on holiday in Greece. According to the available reports, the incident involves a collision during the tourist’s trip with friends. The man is currently in a hospital in Athens and is described as being on life support. Sources also state that he has sustained a serious brain injury as a result of the crash. The reports do not provide further details on the circumstances of the collision, the location in Greece where it occurred, or whether any other people were injured. No additional information about the investigation, charges, or safety conditions is included in the provided material. Medical information presented in the articles focuses on the severity of the injury and the fact that he remains in intensive care in Athens.