When listening to music at home. I don't know if this is normal or not, and if there are still people who fainted from music, but personally this happened to me 3 times.
I will not answer about myself personally, but this is probably the most unusual situation with fainting that I had to observe.
I defended my diploma at the university - in my case, this is a show of a small collection. Models pass the commission, then line up and wait for everyone to speak out (I'm talking about my concept, reviewer, commission on the pros and cons). One model girl fell immediately after the formation. I stood with my back to them and at first did not understand what had happened - I was telling everything according to plan and suddenly the hall gasped in unison, turned around and saw how the girl in my dress was being carried away in her arms. Given the undergraduate lack of sleep, it looked very surreal to me.
I somehow almost fainted in the ceremonial crew at the parade dedicated to the 65th anniversary of the Victory. Heat, nerves, we stand. Suddenly, the color is suddenly turned off and everything around becomes black and white. Well, the comrades in the "box" caught me, gave me ammonia, and with practiced movements they carefully passed me back, replacing me with a stunt double and sending me to rest. I never made it into the front line that day, although I had been preparing for a long time. Happened.
During an in-depth interview, can you imagine ?! Moreover, an interesting interview (I was a moderator) devoted to the latest world trends in the field of power units for passenger cars with a wonderful storyteller, an expert - darkened in the eyes, a slight nausea and I almost slipped under the table. For no apparent reason, as Forest Gump said. Maybe blood sugar has dropped, it happens. The expert, poor fellow, took it personally and immediately got ready with the words: "Something I started talking to you completely. It's time, it's time, a fresh breeze is already blowing in our faces ..."