He told his best shooter, Wesley Person, to pull an Ainge - and never stop taking shots.
Wesley Person led the Suns with 27 points and a career-high 15 rebounds.
The Cavs had taken a 97-94 lead with 3.9 seconds left on two free throws by Wesley Person.
Wesley Person had 23 points for the Suns, who hit 15 of 28 3-pointers to finish within one of the franchise record.
Charles Barkley scored 24 points, Wesley Person had 20 and Johnson 17, 12 in the first half.
Johnson and Wesley Person contributed 21 apiece for Phoenix, which improved to 14-25.
He also grabbed a key defensive rebound with 1:18 left after Wesley Person missed a 3-point attempt that would have tied the score.
Wesley Person of Auburn scored 22 points and had 8 rebounds for the winners.
Wesley Person and Lamond Murray have yet to fulfill their potential.
And we don't know on this team if Wesley Person could have done the same things he's doing for Phoenix.