think of the previous comic...
I didn't understand any of them.
The answer is crystal clear; You have no sense of humour, yay!

Whatever! I just didn't understand the 3rd (and may be most important strip of the first comic.
When he says "Shit happens", there is Bob's memory bringing him the happening in the last comic.. And first he says "And I don't want to talk about it". Got it now?

Someone has to get it in with a teaspoon... No offence of course, that is if you're too stupid to understand it was a joke.. I mean, what?
=P