Some good places to get this achieement is Airport, under the plane wing, even easier in Spears mode as one of them is placed directly under the wing.
On East River, the huge roof just beside Spear A in Spears mode is a great place for this.
On Brooklyn Bridge at Spear is a decent postion to get this.
On Hells Kitchen, the huge red wallway across the map in the middle is tall enough to make a jump from too.
I got the achievement by not getting a direct hit, yet some players are claiming it must be a direct hit, so just keep trying. Good luck.