I'm going to suggest because it was 10 days ... and I did a much more thorough cleanse this time. I did a 90 minute cardio every single day of the cleanse in which I sweat my @$$ off for 90 full minutes every day ... so, I think I was ultra cleansed this time as well.
Also, there have been times where just eating a very clean diet for a long period of time and then suddenly introducing something greasy like chips or popcorn has given me that reaction, come to think of it. As a matter of fact, more I think about it, it's not the first time I have ever thrown up from movie theatre popcorn.