I guess we can't choose our delusions

I've been sick all week and had to delay my trip to NY :-( I hate laying in bed for days and not doing anything except feel pain and tired, anyway I got delerious from a high fever and thought I was stuck to my sidewalk outside and my cat was trying to get me back into the house. It was so realistic and I kept thinking how did I end up outside, very strange indeed! Why a side walk though, why couldn't I have had a delusion that I was stuck in a cartoon or something? I guess we can't choose our delusions ?