Protoscope Tip

I had some time with my girlfriend today and we finally got to try out a new toy. It's a clear plastic protoscope that was fairly inexpensive. I just wanted to give some advice to anyone who was thinking about playing with a similar device: don't make any plans on being in public for a couple of hours. Somehow air was "sucked in" during the scene we had, enough so that within about 30 minutes my stomach began cramping, and within a few minutes after that, I was more flatulent than I had ever been in my life. I'm talking about loud...outrageously loud gas that just kept going and going and going. Just something to think about if you ever get your scope on.