The scene shows an overlap of George and Fred Jung reflecting over the years past when George was a child and young man. This reflection brings sadness to both George and his father, Fred.
Michael Newman witnesses his past-self treat his father with anger and disrespect which brings his father to tears. Michael knows that this was the last opportunity he could've seen his father before he died, making the scene emotional for Michael also.
After finally getting her memory back, Allie quickly falls into a state of confusion and reacts harshly to Noah. Upon realizing she's lost her memory, Noah breaks down into tears as the nurses attempt to calm Allie down.