Pull Throughs - Posterior Chain plus Grip
http://www.synergy-athletics.com/freebonus - The pull through is a quality supplemental and accessory lift (not a primary movement exercise)
Muscles Targeted: Low back, hamstrings, glutes
Exercise Description: Grab the object (sandbag, cable, band) between your legs, pull it through your legs by utilizing your hamstrings, low back, and glutes. I prefer to pull the band slightly in front to emphasize squeezing the glutes.
The other cable and band variation is to snap it up only to between the legs