I just don't really understand that kind of attitude from GB runners. I won't deny one obvious thing: yes, there will be unpredictable events in life and I'm aware of the fact that these things can happen at any given time. But why doesn't OP show a sign of life, be it a simple message: Sorry, I underestimated x, I'm so utterly busy with school/work whatever and so on. Just nothing isn't much. Even if OP showed up, I wouldn't want to be part of that GB anymore.