The left glute shot is a bitch for a right handed person, especially when pinning 3ml through a small pin... Like a 25 gauge...
About halfway through my back starts cramping up from being in such an awkward position and I try to take a break, which never works...
Delts are by the easiest, but after a few years of 3ml shots in each of them, I've built up a decent amount of scar tissue, which has unfortunately turned me into a glute man...
I probably would've freaked out if I bent a pin at a 45 degree angle... lol