The rear delts usually get neglected, but this is a pretty easy fix and one you can do at home on a daily basis. The band pull-apart will bring your sad little finger-sized rear delts up to snuff quickly.
You don't need a heavy-duty resistance band because you're going to keep the reps high. Rock bottom rep range is 20, done for 4-5 sets daily.
Thibs is a sadistic SOB because he's always glad to bring more pain your way. This time the red glow of his laser sight is dancing around your chest and he's ready to pull the trigger.