A special family Christmas memory...
Right after Conrad yells "Give her the goddamm camera!" which prompts the zombie mom to take a quick snapshot of Dad.
That would be funny, sad and highly awkward if, later on down the road, the family was going through the photo album and came across this photo of Calvin.
"I remember that photo. It was right after Conrad cussed out his parents." For reasons that probably should disturb me, I laughed when I imagined this scenario.