anyone else experienced this?

I was standing in a snack line at a drive in theater outside and it was very warm in the building and there was a lot of dark red lighting which started to make me feel light headed. I ended up passing out for about 2-3 seconds. My husband caught me and I feel fine now but has anyone else experienced something similar? It was very random and I think my environment might have caused it but google says that fainting during pregnancy is fairly normal.