IM A FIRM BELIEVER IN SITE INJECTIONS. FIRST OF ALL WHEN YOU SITE INJECT, I DONT THINK YOU HAVE TO DRIVE THE NEEDLES IN ALL THE WAY TO THE HILT, ESPECIALLY IN THE CHEST. GO AHEAD AND DRIVE IT IN STRAIGHT, JUST NOT ALL THE WAY IN. MAKE SURE TO APPLY PRESSURE AND MASSAGE THE SITE THOUROUGHLY, AS TO NOT LOSE SOME OF THE JUICE. YOU WILL DEFINATELY NOTICE A DIFFERENT PUMP IN THAT LOCATION. OR MAYBE IT JUST WORKS FOR ME, WHO KNOWS