This here, this has everything. There's Marcus pulling down Markel Brown's shorts, Marcus convincing Andrew Wiggins to put on a terrible suit, Marcus lobbing an alley-oop to fellow Celtic rookie James Young with his head and so much more. My personal favorite is Marcus getting a clearly perturbed Jabari Parker to read a "Boring Jabari Parker" tweet.
Smart appears to be a pretty fun teammate and he's already making a lot of new friends in the NBA.