The scene where Baker's dog bites Ashton's nutsack and then grabs his ass by the scent of meat in his underwear. It was hilarious!
This movie cheered me up a bit.
When you see my face, your life is done!

The whole speech with the "BAM! BAM!", ending in "I can run from me, but I can't hide from me." And then Tom's reaction: "What a nightmare!"
Steve Martin and Ashton Kutcher had great scenes together. It was also great when Kutcher's character said something along the lines of how he and Nora can't go out in public because he's getting recognized everywhere. I just realized it was Bonnie Hunt who responded with the "really, just the one commercial?" She can be funny sometimes, but I think that line would have been a lot funnier delivered by Steve Martin.

When the boyfriend of Nora is talking to the parents and one of the kids is looking bored.

For some reason, the part where the neighbors walk up, the wife looks at the car and says "Oh, they're fast food people" makes me chuckle.

When Aston Kutcher says his face is the money and he's man enough to admit he's not that good of an actor.

All of Kutcher's scenes.
"Vive la mort, vive la guerre, vive le sacre mercenaire."

I gotta say.the BEST PART THAT GETS ME EVERY TIME is when Hank comes over and they soak his pants and then put meat in them and the dog attacks him ROTFLMAO!!! AND LMAO at how Hank talks to the parents hahahaha

When Gunners chewing up Hank the model/actor and Mom says, "He's really hungry" cracks me up every time.

Me and my family crack up on the part where the kids are at the school confronting the bullies. One kid knocks the bully's drink out his hand and the bully yells, "my latte!"
lol. too funny, those bullys were lame.

lol, that part if funny.
I like
When they move into the new house.
-Tom: "Ok, here we are. Everybody gets their own room, but the twins share Now, go kill eachother for the best one!!"
Kate: "Oh, that's great."
(or something like that)
The whole birthday scene at Dylan's.
Basically all of the moving into the new house.