The Nordic hamstring curl is a good example of a commonly-used lowering (eccentric) exercise.
With their feet secured, the athlete resists falling forwards onto the floor, and attempts to lower themselves slowly and under control. When they reach the point that they can no longer stop themselves falling, they catch themselves with their hands out in front (often onto a foam mat if they are still new to the exercise, and are going to fall a long way!).
Then, they get back to the starting position by flexing at the hip, and using their hands for assistance (i.e. not the same way they descended). Therefore, there is no real lifting (concentric) phase.