When your weight is on the front of the chair, it sits up with you. As you lean back, the chair reclines to a very comfortable relaxing position. If you ever want to get up again, you just move your centre of gravity forward and with a gentle bend of the knees you're out.
The rocking deckchair folds flat with one easy scissors movement and unfolds again just as easily - no messing about with fiddly props or adjustments.
The extra wooden blocks on the arms are there to keep fingers safe.