A petrol station is a mundane place where you can find an abundance that is untouchable. As you fill up the petrol tank, it is only a fraction of what is available to you. Healing is similar. It is a very big job that takes a long time to achieve successfully. 'Empty tank' looks at how filling up, just to keep going just about enough, is a continuous cycle within the process of healing from trauma.
These works look at what it means to heal from trauma. It attempts to analyse body language and looks at how our bodies move when we are sad, versus when we are happy. Looking at mundane things, in a bleak and distanced way, helped with the healing process, as it gave a chance to just sit and absorb. As is commonly known, healing is not linear and is very often very high, highs, and very low, lows.