Hmm not sure if this is real at all,but hell I ll give it a try... my doctor didnt know what to say.. So,I get rarely a short electrical sting in my left shoulder and it feels more on the front side,not the blade on the back side.. I dont get any chest pain ,or anything... just a quick zap on the shoulder,like a battery zap.. I m 30m,good physical condition.. I do smoke ,no drugs no alcohol..