One time I joined a call after a long night with barely any sleep, eyes barely open.. and the moment I heard, "Camera on, please" I turned it on without thinking only to realize I wasn’t even wearing a shirt! Luckily I reacted fast and turned it off within a second. Somehow no one said anything, and to this day I still don’t know if anyone saw me.
Luckily for me my job has to use Teams so no cameras because apparently Teams can't handle the bandwidth for the meetings. So now I don't have to be on camera.