Complex sentence: Despite the humiliation, Clarence knows he can't do anything about it and takes it--that is until Moe comes out of the store and tells Clarence to go, oblivious to what is happening.
Split into simpler sentences: Despite the humiliation, Clarence knows he can't do anything about it and takes it. That is until Moe comes out of the store and tells Clarence to go, oblivious to what is happening.