The system I chose to reverse for 24 hours was the system I use to go to the bathroom. I decided that for one whole day, I would only pee outside (bowel movements would still be done indoors). This was a large inconvenience, especially being someone who drinks a lot of coffee. For example, I had to be careful about how much liquid I drank before bed, because I wanted to avoid having to go outside in the 20 degree weather at 2am.  I took a photo of where I relieved myself each time I went outdoors. and these four photos combine to make a visually interesting overall summary of my experience.