original_query: What is emotional masking and how does it occur?
query: What is emotional masking and how does it occur in the context of microexpressions?
answer: Emotional masking, in the context of microexpressions, is when a genuine emotion is completely hidden by a falsified expression.  This happens consciously or subconsciously, resulting in a microexpression where the true emotion is briefly displayed before being masked by the false one.