That's pretty terrifying. You can see the somewhat muted apprehension on his face mixed with a hope that he will be out of it soon.
Of course, I'm putting human emotions onto an animal, but that's just because I can easily see myself in such a situation where I'm politely asked to step into a room and face a wall for a brief moment...
Yea my brain definitely forgot what anesthetize meant for like 3-4 seconds when I first opened the picture and it made me sad.. Then I was like wait no that's different. Then I was like but yea you could probably use this for the other thing too. Then I remembered the video youtube recommended to me about some guy that built his own gas chamber for cats out of a cooler and got sad again.