Some TikTok users have themselves started posting videos warning the prank can cause serious injury. At the time of writing, most content being shown following a search for "skull-breaker ...

Despite experiencing persistent headaches, dizziness and hearing issues, Victoria, from West Palm Beach, Florida, initially ignored these signs ... required part of her skull to be removed.

Additional key warning signs to include a loss of balance ... or jolt to the head that may squeeze the brain against the skull. Danger signs include one pupil larger being than the other.