There's a certain achievement in Assassin's Creed: Revelations that springs up whenever the games chooses to. The Tax Evasion achievement is only worth 10G on Xbox 360, or a bronze trophy on PlayStation 3, but boy is it fun.
Watch the video below as YouTuber MonsterAchievements walks you through the process of attaining this achievement. Basically, you have to hook the bad guy and trip him, all the while stealing your money back from him. Kind of awesome, actually!