You could always try it for the 14 days knowing that you'll break the 21 day rule. At least then you'll know that you can do it for 14 days and it will be easier when you restart the ignite program. Maybe you could even try out the next phase, Balance, which is where you use a point system whenever you have something that is part of the 'evil 6'?
That's what I did and it has worked out for me. I think it's easier because you get the chance to try out some Ignite recipes and shakes and find out what will work for you.
I have only been doing the beginner plan intermittently over the last 3 weeks and I've really enjoyed it. I've never stuck with an exercise program for so long and I really feel as though I will stay. There's a lot of variety and great motivation.
I agree with all of these comments as well. I like the idea of the karate video!