Airs
In the past 10 years, the biggest advancement in surfing has definately been in airs. 20 years ago, surfers wouldn't have believed that surfing could achieve such heights. To do an air, you must get a LOT of speed, and turn up the lip at the exact right time. This will launch you in the air. There are many different types of airs: 180 airs, 360 airs, backside and frontside airs, verials, grabs... the list goes on and on. Surfers are developing different kinds of airs every day.