The first time it happened I was 22 (I am 26 now). Had been working at my current job for about half a year at that point and learned that night shift is all alone in the building, which makes it great for playing games, watching shows, reading, and masturbate. When I masturbate at work during the night shifts, I usually just get fully nude, no one else is in the building, latest someone will leave is 1am. I always walk around in the building just to make sure everyone is gone.
So the night I was caught I did make sure everyone had left. Took off my clothes and set them to the side and was just masturbating in my workspace. I had closed my eyes and was just using my imagination and was enjoying myself. In my still nervousness I still like to open my eyes and look around just in case. In my workspace is a big ass window that looks into the room, and on the other side was an older guy with peppered hair staring in like a deer in headlights lol. So, my natural reaction was panic lol, I gave a little scream and ran about 25-ish feet into the server room. I think he said sorry while I was running and I just wanted a moment to hear if he came in the room. He didn’t and I peeked back in and saw no one, ran to get my dress back on me and looked at the security cameras in case I could see him and saw him getting into the janitor’s closest which requires a key (also requires a key to get in the building as well).