In one strip, Andy and Roger are listening to a CD of ambient nature sounds. At one point in the CD, they both hear "Get away from that equipmen—" followed by bears growling and the sound of tearing flesh.
Andy: (reading CD label) "In the Midst of Grizzlies".
Roger: That was the last in the series.
In one strip, the kids are going on about the root BEER they're drinking, and how they're so thirsty they might have two root BEERs. Cue Roger in the fourth panel, asking Andy to remind him never again to tell the kids what he's giving up for Lent.
The Sunday before Thanksgiving 2009 had Jason suggesting that the Macy's Thanksgiving Day Parade could get higher TV ratings if they did their own version of the "Balloon Boy" hoax that had taken place a few weeks prior, using the giant Kermit the Frog balloon.
Andy: Roger, Why is our son looking for a pitchfork?
Near the end of the Camp Bohrmore arc, Morton, who had acted like a Drill Sergeant Nasty all summer as counselor, finds out Jason is Paige's younger brother and deeply regrets how he'd been treating him. He laments that Jason is unlikely to set him up with her now that he resents him, but Jason suggests that until then, he was going to do it for revenge.
At the beginning of camp, the headmaster tells the campers, "We're very proud of our curriculum. In fact, we have a little saying: If you want more Bohr, attend Camp Bohrmore!" They all crack up.
Headmaster: We've got a good crop this year.
Morton: Oh, yeah.
Paige is working on her homework.
Paige: I always forget, is it "I-E" or "E-I"? (shouts) Daddy, how do you spell "relief"?
Paige: And I thought my spelling was bad.
On October 6th, 2013, Bill Amend missed his submission deadline and the newspaper ran a rerun strip. How did Amend apologize for this? With a comic explanation homaging The Oatmeal.