Kent's ball will go in the direction that the ball is going right when he lets go of it.
Imagine this like an analog clock. 12 is forwards, 6 is behind, 3 is right, and 9 is left relative to Kent. If Kent is twirling the ball clockwise and lets go at 3, the, the ball will go behind him as the velocity vector exactly at 3 points behind Kent in a clockwise motion. Here are Kents velocity vectors according to my clock analogy. Hope this helps because this is how I learned it!