Some people can't do moderation after one little taste. Kind of like the Lays commercial "You can't eat just one." I havn't had a problem, but I know some severly carb addicted people where a cookie shuts off the part of the brain that says full and instead sends a hungry message.

I don't know if I could have a carb blowout day. I really don't want things with refined sugar or flour, they don't even look good anymore. I have trouble reaching 20 carbs net, and think about the only way I could really go over is with a lot of fruit.