For some people, 13 is an unlucky number.
On Friday the 13th, a 13-year-old British boy was struck by lightning at 13.13.
The boy, who was at the Lowestoft Seafront Air Festival in Suffolk when the lightning struck on him, suffered a minor burn.
During the incident, St John Ambulance volunteers also treated two other people for lightning strikes.
All the victims were holding umbrellas, which acted as a conductor for electricity.
Clive James, first aid expert at St John Ambulance, said the biggest risk of a lightning strike is that it could stop the heart and breathing.
"If this happens, you need to start CPR immediately and call for an ambulance.
"If the person can walk, move away from the area immediately as lightning can strike in the same place twice," said James.