React in shock is an expression used to describe a sudden and intense emotional response to something unexpected or shocking. The two crossword solutions for this term are REEL and GASP. To REEL is to move unsteadily or abruptly, often in response to a shock or surprise, while to GASP is to take a sudden, sharp intake of breath, usually due to surprise or shock. Together, these two words capture the idea of reacting in shock, which is a sudden and intense emotional response to something unexpected or shocking.