Again, we have a tetrahedral intermediate. And so this tetrahedral intermediate is not very stable. And again, a rearrangement will take place so that we create more stable molecules. And so this sigma bond between this H atom and this oxygen is broken. At the same time, we form the pi bond between the oxygen and the carbon, and that breaks the sigma bond, and those two electrons once more end up on that carbon. So we form this Thiamine Pyrophosphate in the carbon anion form, and we also form that seven carbon second product molecule.