Marmaduke is 'accidentally' stepping into the bathroom and catching his Owner-Lady in a compromising position.

It's not compromising because she's in the tub, it's compromising because Marmaduke hates when people masturbate in his house.

I'm sorry, but this is too retarded for even me to come up with something.

Once again, Marmaduke wants to go swimming.

Marmaduke has trained his Owner-Man to have a seizure whenever he barks. This causes hilarity when Marmaduke barks and Owner-Man is holding something, such as water, near his head.

Marmaduke is slowly becoming people.

Marmaduke's Owner-Lady has grown so used Marmaduke destroying things and eating other things that she gets concerned when he decides to take a day off.

Marmaduke has eaten some poisonous mushrooms and is hallucinating that he is about to eat the last leprechaun thereby putting another species on his list of creatures he has personally extincted.

Marmaduke is amazed that someone whose lot in life is to sell brushes door-to-door would have enough foresight to carry something to scare dogs, the door-to-door salesman's worst enemy.

Marmaduke is fascinated by a twirling hand. For now.

Marmaduke thinks he is Lassie.

Marmaduke is not playing dead. The shell that we recognize as Marmaduke is merely empty and awaiting a new demon to inhabit it at which point it will likely eat the veterinarian's hand as he or she performs routine examinations.

Maramduke is attempting to be nice to his Owner-Man for reasons unknown. Marmaduke's Owner-Man is mistaking this for one of Marmaduke's attempts to annoy and/or crush Owner-Man's pelvis.