Max is incapable of expressing emotions on the internet!

Looky! Max is staying in touch! And he's using exclamation points to mask the sense of depression that fills him every time he looks at that smiling group picture, which contrasts tragically with his last impression, from his desperately flippant statement about a reunion and subsequent departure for the taxi, of everyone's sadness - a disconnect that leaves him not necessarily distraught on the outside but deeply suffused with undirected longing in a "The Graduate" kind of way! Woohoo!