My players have been urging me to write down their humorous stories for quite some time. Several years ago, we had a 2nd Edition campaign set in the city of Waterdeep (a large metropolis n the Forgotten Reams campaign setting - during the summer months, the population would come close to a million people). I was the DM, and was willing to let them shape the campaign world around their actions. Some of their antics were rather memorable.
In one instance, the group was given the job of getting a magical spellbook from a half-elf wizard who had stolen it. They managed to track down the half-elf's house and were trying to figure out how to get in. They thought this wizard would have significant magical defenses and be a scary force to be reckoned with.
The truth is, the half-elf was about the same level as they were, and had very few spells memorized that would be suitable for combat. He did have several magic items, though. However, the players did not know that, and their paranoia was making the situation much worse than it really was.
The building was a simple two-story house in the middle of the street, wedged tightly between two other buildings. There was a door with a window next to it, and except for a second-story window, this appeared to be the only way in or out of the house. The players suspected the front door was trapped. My wife's character, a half-elf fighter/thief, searched the door for traps, but failed to find anything. They figured that she had just flubbed her roll, though, and that the door really was trapped.
So my wife asks if there's a stray dog wandering around. I figured there was a slim chance (15%) that a stray dog was nearby, so I rolled some dice. 8%. I told them that yes, there was a dog nearby. It came up to them, tail wagging, looking for some food.
The minotaur fighter/mage picked up the dog. The elven bard opened the window shutters. They tossed the dog into the house and slammed the shutters. This triggered the alarm spell that was cast on the entrance, causing a bell to ring. (This alerted the half-elf upstairs, who promptly turned over a table in his bedroom and crouched behind it, leveling a magic wand at the door). The players scampered away from the house and hid across the street, waiting for something to happen.
They heard a snuffling sound from the house, followed a few minutes later by a loud barking. They waited a few more minutes, but the dog simply continued to bark.
The half-elf fighter/thief decided that she needed to do something to move things along. She headed down the street and found a wandering food vendor. She bought a small meat pie from the vendor, returned to the house, opened the shutter, threw the pie into the house, then slammed the window shutters again.
The players heard the snuffling sound, followed by some gobbling, slurping sounds. Then the dog started barking again. (At this time, the half-elf is wondering what is going on downstairs and is mustering his courage to investigate.)
Finally, 15 minutes after the party first arrived at the house, they decide to open the door. About this time, the half elf wizard is coming down the stairs to see what the barking is all about. The dog bolts out of the house, nearly knocking over the elven bard and human cleric in the process. Their enemy sees the party, lets off a panicked magic missile from the wand, and flees back to his room. The rest of the adventure went pretty much as I had originally planned from that point. Surprisingly, they even managed to capture the half-elf alive so he could stand trial for stealing the spellbook.
Incidentally, the party never saw that mangy dog again.