I only wish I could remember specific examples. It’s a list of claims, each more outrageous than the last, of the writer’s accomplishments. From the mundane, like being able to program his VCR, to the absurd, like having scaled Mt Everest, singing Gilbert and Sullivan operettas in Japanese, being an international man of mystery, etc.
I know this is far too vague an OP, but hopefully it’s enough to spark somebody’s memory.