The correct answer to this open question is the following.
What we have here is not a question, it is a sentence. Although there is no question attached or another kind of reference, we can assume that the question could be: "write a well-phrased perception check.
So the answer would be the following.
When I saw Franco coming home from the doctor's office, I immediately noticed that he looked pale and his shoulders were slumped. Glancing at me with a sad look, he shrugged his shoulders. I realized that he felt sick, sad, and only wanted to go to his room to take a good sleep.
When you write a phrased perception, you have to describe the behaviors of the individual you are about to comment. The reason why you are perceiving those behaviors, and then you have to include your own interpretation.