'Whoa there!' is an expression used to indicate surprise or shock. It is often used as a warning to someone who is about to do something dangerous or foolish. The two crossword solutions, HEY and COOLIT, are both informal expressions that can be used to express surprise or shock. HEY is an exclamation of surprise or shock, while COOLIT is an expression used to calm someone down or to indicate that the situation is not as bad as it seems.