Lie down on an inclined bench and position dumbbells above your upper-chest level.
Lower one side/dumbbell in a smooth and controlled manner until your upper arm is a little past parallel to the floor. After this, return to the starting position and repeat the whole movement with your other side.
DO
DON'T
Lower the weight in a smooth and fluid manner
Don't lower the dumbbell(s) too fast as this may result in injury
SPECIAL NOTES & LEVEL of DIFFICULTY VARIATIONS
To increase the level of difficulty, do this exercise with heavier dumbbells.