This, from Barker's Midnight Meat Train is an example of the kind of narrative I've never attempted before, to be right inside the character's head:
... There was laughter now.
Kaufman calculated the risks of his situation: the mathematics of panic. If he remained where he was, sooner or later the Butcher would glance down at him, and he'd be mincemeat. On the other hand, if he were to move from his hiding place he would risk being seen and pursued. Which was worse: stasis, and meeting his death trapped in a hole; or making a break for it and confronting his Maker in the middle of the car?
Kaufman surprised himself with his mettle...
You see also that Barker sticks to showing his character's nature whilst also giving us links to the character's world in carefully chosen prose: Kaufman is in accounts (hence use of mathematics and calculated), with reference to the Butcher, Kaufman will become "mincemeat".