The term 'THAT's Incredible!' is an expression of amazement and surprise. It is often used to express disbelief or admiration for something THAT is extraordinary. The crossword solutions for this term are MAN (3 letters), WOW (3 letters), GEE (3 letters), and OHWOW (5 letters). These words all express a sense of awe and wonder, and when combined, they create the phrase 'THAT's Incredible!' which is a powerful expression of amazement.