Just had to reply to my own message to add the parts I liked best:

"He swallows, How could you? with its bitter companions, What the hell were you thinking? and, Why?"

and

"It’s been so many months since the flat line echoed through empty hallways, and Dean fell back from the doorway while Sam ran in...Months since he felt himself slide down to the ground, since he watched Sam clutch at their father’s body and scream...Months since the doctors saw him there, on the floor, pale and shaking, crying and whispering, “No, no,” and lifted him up, led him to back to bed."

and

"Yeah, stopped a great big semi from hitting them."