The Raptors use this drill to get loose while emphasizing a defensive theme - closeouts. In the NBA, 90% of your problems start with bad closeouts.
Players spread out along the baseline, facing forward.
See Defending - Fullcourt closeouts
, Raptors closeouts
a) Close out
On "go", sprint halfway to the first line then break down, choppy steps, close out with two hands up, weight back.
Repeat on "go" three more times fullcourt.