So I had this dream last night..

In my dream I somehow stole 2 kegs from outside of this store. Me and a couple friends began indulging when my sister showed up, with another keg but it was only half full. (Note that this specific sister of mine just got married and is completely straight edge, so this was an odd scenario.) The kegs didn't have to be tapped though, they had a top like the cans of Camble's Soup that have a little tab and you simply pull it up, and pull off the top. After I was significantly drunk, I passed out. When awoke this morning I felt like I had a horrible hangover... So my question... Since I definitely didn't get the chance to drink last night, why the fuck did I have a "hangover" this morning? Has this happened to anyone else?

I have, but thats because my roomates were drinking and i was smelling the alcohol the entire night. It was more of the sick feeling without being sick. My friends have tricked some people before by giving them non alcoholic beer and the person seems to get drunk all the time. So i guess its all a mental thing.