This exercise should be performed at eye level, or slightly below.
There are four variations on this exercise:
Clockwise pirouetting remote clockwise circles
Counterclockwise pirouetting remote counterclockwise circles
Clockwise pirouetting remote counterclockwise circles
Counterclockwise pirouetting remote clockwise circles
The first two are easier because the pirouette goes with the travel direction, so they should be mastered first.
For nonmicro helis, these should be done with about a 4 second pirouette in a 20-30 ft circle.
For micro helis, these should be done with about a 4 second pirouette in about a 10 ft circle.
When attempting this exercise, do not bank too much, because this increases the risk of hitting the tail boom on the ground.