Explosive pulling is almost 50% of my training volume. Nothing builds the traps, mid-back, lower back like these exercises. They also allow you to build the same explosiveness as the olympic lifts without the technical difficulties.
Here are the 3 main types of pulls I use.
The first one is the high pull... in that exercise you launch the bar aggressively in the air with the legs and hips. The goal is to pull it as high as possible, shooting for at least lower chest level, and ideally mid to upper chest.
Even though you are pulling high, you should not pull with the arms too early, only when maximum momentum of the bar has been created by the legs and hips.
Here is a video of one of the athletes I train. She is doing a complex of high pulls + snatch. She is starting the high pull from the floor, but I recommend starting it from blocks if you do not have a background in olympic lifting.
Notice the back/shoulder/arm position... thigh mid-back but relaxed arms.