If he feels up to it, but I don't know if the specifics of what are heard really matter. This seems to be a psychological effect more or less and that means each person's psyche is going to find a different way of presenting symptoms.
I wish I could tell you something more definitive for your case. My only recommendation would be to pay attention and see if you find yourself acting like him even when the light isn't green. I thought I was turning into someone unrelated to me entirely, so it's likely just another aspect of the green light. However, I also don't have your complications...so if he is waking up the easiest way to tell will be if you notice it without the effect of the light.
no subject
I wish I could tell you something more definitive for your case. My only recommendation would be to pay attention and see if you find yourself acting like him even when the light isn't green. I thought I was turning into someone unrelated to me entirely, so it's likely just another aspect of the green light. However, I also don't have your complications...so if he is waking up the easiest way to tell will be if you notice it without the effect of the light.