I was watching last night when Vanessa started going on and on and on and on about the food fight, getting all upset, ensuring Shell agreed with her (despite Shell up to that point enjoying the night). I was screaming at the telly - she was winding them up so much you could see it was going to kick off.
Her initial concern seemed to be that Dan was playing along with the harem, which would mean she would definately be voted out on Friday. Then she started with her "they're beneath me" rant, then the "I'm African, I can't bare to see food wasted" tirade. Victor and Jay were slagging off Dan, Vanessa then said she liked Michelle but not Emma and she couldn't stand the mess, living like animals, everyone beneath her etc.
I really do think this wound Jay up so much, that's why he went into the kitchen and demaned they tidy up...then the fireworks started.
I do think the fight would have happened anyway, but I do think that Vanessa was the catalyst for it. I've also read that she told Shell she couldn't stand Nadia trying to be her (Shell's) new best friend.
All of Vanessa's bitching seems to stem from deep insecurity that she will not be the most popular....yet denied by saying she won't lose her dignity by trying to be popular!!