So I can't redo because my code passed but if
try
            {
                while(numSeconds > 0)
                {
                    System.out.print(numSeconds + " ");
                    numSeconds--;
                    //Thread.sleep(1000);
                }
                System.out.println("Go!");
                //throw new InterruptedException("What");
            }
            catch (InterruptedException e) {
                System.out.print("Interrupted!");
            }
Not having Thread.sleep(1000) in there; I get this error: exception java.lang.InterruptedException is never thrown in body of corresponding try statement. Can someone tell me why?