The teen was out celebrating in the annual ‘fiestas’ of the small town of Bunyola, 7 kilometres from the island’s capital of Palma.
According to Spanish Civil Guard police and local emergency services, the victim received the shock when leaning against the lamp post while urinating on top of a wall.
He collapsed from the shock and hit his head on the ground, Spanish daily El Diario de Mallorca reported.
Emergency services were unable to resuscitate him after being alerted by the victim’s friend.
Local authorities are now investigating if other lamp posts in the area have faulty wiring like the one that caused the 18 year old’s death.
All other Bunyola celebrations have been cancelled in the wake of the tragedy.