Think of the BB as like this....get a 20c coin and place it on the table. Spin the coin. That was the state of existence before the BB...a perfectly symmetrical quantum state. Now let the coin slow down and drop on whatever side it chooses. That is symmetry breaking...when the coin hits the table, that is the BB and inflation. The sound you hear is the energy of inflation being transferred into the new state at the end of inflation....the BB. The side facing up is all the laws of physics/nature that are present in that Universe.
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