Scum

From Telegraph.co.uk:
In the unprovoked attack on the service from Hastings to Charing Cross, the youths touched the Swedish tourist's hair with a lighter as she walked through the carriage.

The woman, a teacher on a school trip, only realised she was on fire when her students started screaming and she was able to pat out the flames. Police are hunting four boys in connection with the incident, which happened on July 19.

Via Videosift.