This is missing the point, but there are successive nows, successive moments. He says, 'my nose grows now,' but right now, in this first moment, his nose isn't growing, therefore the claim is false, and his nose grows then, in the moment that occurs after the first. That is: the first moment lasts as long as the time it takes to make the statement, 'my nose grows now,' (approximately 1 second). In second 2, the nose grows because it is a different moment, a different now from the one in which the statement was made. So, I guess the answer is that his nose grows. Or you could just change his statement to say, 'my nose will grow in 1 second.' Told ya it was missing the point.