To my mind, this is an authentic piece of work and that is why it may sound odd to us. Then, we might consider a range of meaning we are free to attribute to each word. For example, we may associate a father and a son with a creator/producer and their creations/products. Next, it is possible that by paying attention to our fruits of various kinds we are going to become more aware of ourselves as creators as well as our productions, such as our thoughts, emotions, spoken and written words, including activities and behaviours.
What a surprise! Our productions are not restricted to material things, are they?
By the way, we may connect the skull to a grave in a sense that if we identify with our introjects or give them power over us, that is a disapproval of creativity, spirituality and self-management. On the other hand, sneaking out of the skull could mean winning our power back. We are going to be able to use attributes of psychological functioning as our agents, not our masters.