Great Britain 2011 Wheelchair Rugby

Great Britain is issuing 10 stamps on 27 July 2011 as a precommemoration of the Paralympic Games 2012; among the 10 stamps is one featuring 2 persons on wheelchairs fighting for a ball, captioned as "Wheelchair Rugby". The fact that it is a contact sport, and its name are all this sport has in common with rugby union! And it is played with a round ball, as shown on the stamp! Description for it does sound pretty violent, and according to an entry in Wikipedia, its original name is murderball! Suffice to say it is a contact sport played by disabled people on wheelchair on a hardwood court with 4 wheelchairs to a side.