TIFU by staring at a client during a couples massage..

I'm a Registered Massage Therapist (RMT). Often during treatments, especially when using Swedish techniques, I tend to visually zone out. I find it easier to focus on what I'm doing with my eyes closed to just staring into space. Just work by feel, ya know?

Today another RMT and myself were booked for a couples massage. My client was female and my coworker had her male partner.
Now, today I'm more tired than usual. It was a very gusty night and the wind howling kept waking me up. So as I'm working in the warm, quiet and dimly lit room, anytime I close my eyes I can feel my body wanting to doze off. In these types of situations, a couple coworkers and myself will start doing facial exercises to try and keep ourselves awake without disturbing the client or taking away from their experience. Think like, super wide eyes, clenching and unclenching jaw, furrowing and unfurrowing brows, puffing up cheeks and sucking them in, etc.. It's weird, and it looks weird... but it does help and usually no one knows unless there's another RMT in the room.
So I'm making these weird faces to try and keep myself awake and on task, and the appointment is going as normal. The other RMT has their client turn, puts their eye mask on, I have my client turn over and give them an eye mask and thrn I continue my face exercises.
At some point, I'm away in my head somewhere while working away and not paying attention to what I'm actually staring at while continuing to make these stupid dumb faces... when suddenly I zone back in and notice my coworkers client staring back at me with a very disturbed expression. My coworker had removed their eye mask because it kept sliding off, and I hadn't noticed. I had been seemingly intently staring at this poor guy, making bizarre faces for at least several minutes at this point. He didn't say anything, so I swiftly broke eye contact and tried to avoid looking his way again for the rest of the session. I basically RAN from the room after the appointment ended. Just feeling mortified by this. And if that client happens to stumble upon this... I'm sorry for making it weird! Thanks for not complaining about my weird staring!

TL;DR: Today I effed up by zoning out and absentmindedly staring at a client during a couples massage while doing facial exercises to stay awake.