The rules have always been a little looser in Mexican professional wrestling but this was a brick too far.
Puerto Rican star Cuervo (The Raven) was knocked unconscious and reportedly had his skull fractured after being blindsided by a brutal blow to the back of his head in a match against Angel o Demonio (Angel or Demon) at the Lucha Libre Boom show.
Cuero was standing on the ground outside the ring when his opponent launched the missile and sent him crashing face-first to the floor.
The "death match" was immediately called off. Angel o Demonio jumped out of the ring to check on his fallen rival but was ordered away by a doctor.
Cuervo was rushed to hospital where surgeons operated to remove a blood clot. "It was an epidural hematoma and he had a skull fracture," a promoter of the show announced. "He had surgery to drain the clot. He is out of danger, is in intensive care and is responding satisfactorily."