<human>: Provide a brief overview of the text.

A couple of years ago I had a roommate whose girlfriend regularly stayed over. She had a small dog that she would often bring with her. I came home from work one day and no one was home except for this dog. Having no idea how long my roommate and his girlfriend had been gone I decided to take it upon myself, being the GGG that I am, to take the dog for a walk just in case it needed to go to the bathroom. We get about half way around the block and i notice some lady standing on her porch. She says hello and we exchange formalities, lovely day, what have you... I get ready to start walking again and just as I look back to say "lets go", I noticed the dog maneuvering into the "I'm going to take a shit now" stance in the middle of the sidewalk. Before I can do anything the dog proceeds to spray diarrhea all over it. I look at the dog, and then to the sidewalk, and then to the woman. I give her a kind of half shrug thing, all the while thinking how the hell am I going to clean this up, and god damnit, this isn't even my dog. Luckily the lady starts laughing and heads for the hose. I apologized profusely and she tells me not to worry about it and comments on how red my face got. I took the dog home and never walked it again.
<bot>: Took roommate's GF's dog for a walk to be nice. Dog projecdiarrheas in the middle of the sidewalk while i'm chatting with the owner of the house it happened in front of.