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This is the moment a drunken passenger punches a coach driver full in the face after being told not to smoke, causing the vehicle to crash into a tunnel wall at over 50mph.
The shocking incident, which left other passengers screaming and clinging onto their seats in terror, happened in China's north-eastern province of Jilin.
The long-distance bus, whose driver was only identified only by the surname Sun, was ferrying passengers between the cities of Yanji and Tumen on October 27 when the drunken attacker was told to stop smoking.
Security footage from the bus shows the inebriated man, identified only by the surname Zheng, stumbling up the aisle towards the driver's cabin before suddenly punching Sun square in the face.
The unexpected attack causes Sun to momentarily lose control of the bus, which veers violently to the right and slams into the concrete tunnel wall.