Related to times spent actively "at" or "doing" your work in relation to your job and livelihood when you have absolutely no memory of those deliverables or the time spent on them. This is not meant to imply that you are imbibed or physically impaired in any way. You are simply so over-worked, that you have entered a mental state that no longer accepts memories of actions being executed, discussed, emailed, delivered, etc.

When you eat dirt for the first time and leave your family to build a shack in the woods