"Oh-it's pretty in here..."
He smiled softly
"Oh-like juice! I like juice-mom used to make lemonade...w-wait...where...? what...what was...I...s-shit-shit i-it's g-getting worse-"
(Creutzfeldt-Jakob disease-so basically what we're seeing right now is the early stages of dementia setting in-He already has trouble with swallowing and he's most likely gonna start losing speech soon-he's also got some problems with stiffness and rigid muscles as well as periodic spasms-)