In the spirit of telling the stories of how your players throw wrenches into your plots. How do you, the GM, throw wrenches back at your players in the same manner?
For instance, both my female players have female characters. I've since had them be hit on while at a ball, also forcing them to have to dress fancy, no armor or weapons that they are used to carrying and wearing. This makes for some comical dialog between the women and who ever is trying to court them at the time.
Now there are rewards for going through with this. While my female commander may not know it, but she's agreed to a date aboard a Marauder corvette, little does she know, the Zygerian that is taking her will have the ship cleared of crew, so that it will only be herself, and him aboard, allowing her the prime opportunity to "acquire" the vessel for her own use.
So what wrenches have you GM's thrown at your players, comical or otherwise?