I'm always amazed and sceptical of such stories of people carrying a fuckton of money or other precious/confidential stuff on them and then forgetting them in a cab/subway/restaurant. I get uneasy with just three-digit amounts and check almost compulsively if my wallet is still in its place, and they guy manages to forget a briefcase with 600K? Doesn't add up.
My wallet is devoid of cash money and I compulsively check my pocket if I'm convinced it feels lighter than it should. All the time.
But I've been mugged before, so am probably a lot more aware.