Hello, I just experienced something and I’m not sure what happened. I am 32 and I’ve had this happen a few times before in the last 10 years. I sat down in my computer chair and I think I took a gulp of air wrong or tried to breath in an out at the same time. I had a pain across my chest. I stretched my arms up and then when I put them down my body felt like it had gone to sleep aka pins and needles, all I could see and hear was like tv static. This seemed to last a long time. My girl friend said she saw me starting to slump forward and my entire body slowly shaking. She says that it lasted less than 2-5 seconds. I have experienced this before. Once when I jammed my left elbow really hard and once when I hit my head in the bathroom.