John Mayer playing Gravity on the floor

John Mayer performed his biggest hit "Gravity" during 12th edition of Rock in Rio in 2013 in pretty unusaual way.

Rock in Rio is the largest music and entertainment event, a series of music festivals held as far in three cities: Rio de Janeiro in Brazil (5 editions), Lisbon in Portugal (5 editions) and Madrid in Spain 93 editions). In 2014 next edition will take place in Lisbon.
All editions gathered nearly 6 million people and hundreds of world top musicians of different styles, from pop, rock, metal to jazz and samba.