Well god damn! I have just had a few bad injections in 10 years of using AAS on and off whenever I was involved in bodybuilding. I prefer to do short ester stuff and orals. So with short ester stuff,, I inject every day. Sometimes I inject every day for up to 10 months none stop. I got to utilize everything from chest, traps, triceps, quads,,, you name it. My worst injection was when I injected into my trap. I always inject dead center of trap. And when I do inject into traps,, I am going through a lot of god damn nerves and it does not feel good,, but you do adjust to it after awhile. So one day I injected into my right trap. I started hitting a bunch of nerves as usual. After the 1 inch 23 guage was all the way into my trap,, I started injecting and all of a sudden the nerves in between my shoulders blades burned like a god damn hell. It was like a hot clothing iron being put in between my shoulder blades. I think its because I injected a little to close to my neck. I took out the needle super fast and went to my bed to rub my upper back a few minutes to calm the pain down. Luckily,, nothing bad happened after the ordeal. But its something I'll never forget.
Another time,, I injected tren ace in my quad. I was done injecting half of the 1ml I was injecting and I just went into the most nastiest coughing fit imaginable. I somehow continued to inject the other half a milliliter and I was coughing like crazy and shaking like crazy. I finished injecting the whole milliliter and blood started gushing out like crazy. Had to use a bunch of paper towel to stop the bleeding while I was coughing like crazy. I calmed down after 5 minutes and I was able to stop the bleeding. Another experience I'll never forget.