I've lost 4 kg in 1,5 week by eating channa.....
So thats about *9 pounds that you lost in about 10 days... *
i) Its water weight
ii) Anything beyond 1 lb per week is not healthy, decreases your life span, makes you prone to diseases by weakening your immune system
iii) You will gain it right back if you aim for 10lbs per week