Firefighters are worried a new 'firespray challenge' craze sweeping across American social media is making its way to this country.Young people across America have been lighting aerosol cans and uploading videos of the dangerous act to social media sites like Instagram and Facebook.But Teenagers have been warned the new online trend is not "clever or funny".The London Fire Brigade's Group Manager for Community Safety, Mark Hazelton, said: "A number of young people in the States...
