Pull
From Halopedia, the Halo wiki
Pull is a multiplayer medal in Halo: Reach. It is currently unknown what its requirements are. is is suspected it is to kill a jetpack player in mid-flight as its name is from clay bird shooting where you shoot airbourne objects and also its of a similar apperance to the headcase medal. It was revealed post-beta along with several new and updated medals in the 05/28/10 Bungie Weekly update.[1]
The medal shares its title with the Halo 3 achievement, so it may be another Shotgun achievement.
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