Terrible

At 4.40 a guy I work with, have worked with for several years collapsed in front of my eyes. It was so sudden, he made a noise dropped to the floor and started to turn blue. I called an ambulance while some people from the office attempted to put him into the recovery position but his breathing was erratic and his skin was swollen the wrong colour. The paramedics arrive within 5 minutes and they asked us to leave while they attempted to revive him.
I felt shocked, my hands were shacking, I made a phone call to head office to get details of his next of kin for the paramedics.
Twenty minutes later they cleared out, one of the team told us it looked bad essentially he was dead, they hadn't been unable to revive him, efforts would continue at the hospital. I hold out the hope that they will be able to help him, but I the picture of how terrible he looked out of my mind.
I got a lift home, now I feel terrible I've never witnessed anything like it, was so shocking. He had been fine all day we even went together to get a sandwich, I still cannot believe it.