Pete looks utterly distraught in that last panel–Oh, my God! She’s making me meet her grandfather! Well, this relationship is over…too bad, I thought it might have worked, but no, she’s gotta bring in the grandfather….
I can’t think of any other explanation for the expression oozing off his face–unless he once had a dream that he would die at the hands of some girl’s grandfather, and all of this is exactly like that dream….
The point is, he sure doesn’t look happy at all about this, and it’s worrying him to the point where he doesn’t even notice Mindy’s transformation into a 1960’s toothpaste advertisement.