Eric, from what I have read hairpining would be if you were using what is refer as public internet on a stick to allow vpn clients to asa outside internet without using split tunneling in asa. You could either use with split tunneling or outside nat enabling hairpining with same-security-traffic permit intra-interface

Configuring split tunneling

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a0080702999.shtml

Or public internet on a stick.

same-security-traffic permit intra-interface allows the traffic to exit out on the interface it was received on

global (outside) 1 interface

nat (outside) 1

rate any helpful post if it helps

HTH

Jorge