Just to look at the other side of the coin.
Maybe the man wasn't feeling well at the time and didn't feel like getting out of the chair again. Just because he walked into the unit doesn't mean everything is ok. He could have bad joint pain or any other numerous conditions that you can't see.
It's been my experience at the nursing home...you ask a resident if they have to go to the bathroom and they say no. You help them into bed and get them all situated and then they say they have to use the bathroom.
I think the staff should have covered the cup when bringing it out from behind the privacy screen. Did they put it in a trash can?? (needle bin ) They should have taken to a toilet and disposed of it properly. Staff should never ...roll their eyes.... concerning a patient, this is being disrespectful and unprofessional.
Just a few thoughts for the day