Mr. Threehorn D'oh!

[LittlefootAndAliTogether]

Topps: Where's Cera?

Littlefoot: She said she went into the Mysterious Beyond to go see if she can go be eaten by a Sharptooth.

Topps: What?  Why didn't she tell me?

Littlefoot: She did.  She said that you and Tria told her to have fun and not be late.

Topps: I've been so worried about her.

Cera:  (Comes on screen) I've been here the whole time.  It was just a joke.  

Topps: (Does D'oh motion like in picture.)

[Coyote_A]

Littlefoot has just told Topsy that he and Spike were a couple.
Mr. Threehorn (cranky conservative voice): "I knew it! First longsnecks, threehorns and spiketail just become friends and then it only gets worse from there!"

[rhombus]

Littlefoot:  "Well you see sir... Cera and I have decided to date..."

Cue this reaction from Topps.