A flying sushi service tray known as the “itray” created using miniature remote-controlled helicopter rotor blades, is shown by a member of staff at a “Yo! Sushi” restaurant in London

A flying sushi service tray known as the “itray” created using miniature remote-controlled helicopter rotor blades, is shown by a member of staff at a “Yo! Sushi” restaurant in London, June 10, 2013. REUTERS/Neil Hall (BRITAIN – Tags: FOOD SCIENCE TECHNOLOGY BUSINESS) – RTX10J83