The simplest explanation is usually right. Or so the saying goes...

[ It's a little easier to hold Kadoc's gaze in conversation, even when the focus on his face becomes too much and he wants again to drop his gaze and see the rest of him. The sweet spot of comfort he eventually finds is the corner of Kadoc's mouth where he'd seen it twitch, where he ends up addressing half the time instead of looking Kadoc in the eyes. ]

It's more than plausible. Brain goes haywire just before death. I can imagine me imagining all this. You?