Bryant humorously expresses his mental state by saying he's "losing my marbles," which reflects his lighthearted approach to feeling a bit out of sorts. Using the phrase "totally East Ham" suggests he feels a little disoriented or confused, indicating a playful self-awareness about his situation.
The mention of being "one stop short of Barking" adds to his comedic tone. It paints a picture of being close to a destination but not quite there, reinforcing his whimsical perspective on feeling lost or bewildered. This quote encapsulates Bryant's quirky personality in the context of the story "Strange Tide" by Christopher Fowler.