Ideas - Toy Story
The DragonSlayer have a great dinner and a little too much wine to relax after a long adventure. (Like they ever have a long adventure) They all awake in a strange inn, with their armor and weapons but without smaller items like special magical items and spell components. They are in a couple rooms on the second floor, but besides them they are all all. They quickly gather and start down stairs when the whole building shakes. The building in slip in two and a giant ten times their size starts to play with them.
This would not be the first time the DS would be "shrunk". There are a couple ways this could go, but you get the idea. While the group may just view this as a combat challenge, it would be a good time to really work on puzzles in not combat, non death trap situation.
