Could someone explain his xkcd comic to me

Just read today’s comic (April 4th 2011). Is it just me, or does it look like Randall just find out someone has a fatal disease?

That’s been a running theme for about a year now. Someone close to him is dying.

Suppose you *could *make a phone call to the future. Would you really use to complain about somebody’s fashion choices?? What are these people thinking???