That's Strange

This is about two years after 2015 PAX (The one Sean went to for his first time in America) Jacksepticeye/Jack/Sean has been posting his videos as usual, so it takes the eye of a great friend to realize a slight change that might be connected to a bigger issue.
Markiplier/Mark is curious about some small changes in one of his friend's behavior so he becomes determined to find out what caused them, and just how much greater these changes are vs how they appear to be. ((Zap will edit but not comment in this version ))