By now we were nearing the end of our Tanzania and Zanzibar adventure, looking to spend the last few days exploring the bustling and chaotic former capital city of Dar-Es-Salaam. The crossing from Zanzibar back to Dar had been noteworthy mainly because at least half of our fellow passengers were seasick on a journey where we had simply enjoyed the movement of the boat and certainly didn’t think it was a rough crossing. Dar, hot, dusty and humid, isn’t a place where traipsing around loaded with backpacks and struggling to find your hotel is an attractive prospect and we were just getting a little fractious when a skinny, swarthy individual…