According to Fabian Basabe it looks like Tyra dropped a load:

Just when I start getting comfortable and ready, a group of madmen and madwomen storm in and take possession of the suite because… ready?… Tyra Banks messed herself and needed to change. Now, let’s break this down: messing oneself should not happen if you are older that 5 or younger than 90. if it happens and in fact you are older than 5 or younger that 90, then it should be one, single, very unfortunate episode which will bound you to be made fun of forever and you can’t complain about it. Now I would like to bring to your attention that Tyra’s people carried a change of clothes for her at NYC fashion week. Hmmmh… could it be that Tyra messed herself before? or just that her entourage is so organized that in case tyra would ever, maybe, possibly mess herself that one time, they have a change of clothes? I don’t know… but all these thoughts were twirling in my mind when in horror I was watching such an abomination, feeling so alone in the world. Meanwhile, everyone is looking at me, to see if i was going to throw a fit because i now have a production crew and no place to shoot. Excuse me please, the suite is great but i think I’m gonna go, you know…

I don’t know if this story is true or not, but the idea of a model compulsively shitting herself is oddly fascinating and very wrong.