Let me start you off with a little background info. A couple weeks ago, my friend Dana was on the train, holding her clutch by her body- not being stupid. Once the train got pretty crowded she noticed some guy kept bumping into her, and thought to herself, "That's weird." A couple stops later, the train jerked, and she felt his hand in her clutch (which was touching her body, by the way). She quickly pulled away, and nothing was taken. Turns out, he had his jacket slung over his arm, got so close to Dana he could put the jacket over her bag, unzip it, and reach in unnoticed. Scary.
So today. There were 5 of us on the metro, a little scattered, and just chatting when about 3 creepy-looking (normal Spaniards, I guess) guys get on the train. My friend Mallory had her bag slung over her shoulder, and a little behind her- a normal position for a bag in the states (apparently, not a good idea in Spain). One of the 3 creepsters attempted the same "jacket-slung-over-his-arm-reach-into-her-purse" kind of move. Dana, who was standing right behind Mallory (and knows a thing or two about pick-pocketers), sees it and immediately slams Mallory's bag into her body. The creepster pulls away quickly, obviously caught red-handed, tries to speak english, and says, "Wot? Wot?"
As a witness of it all, I'd say it was pretty bad ass. Note to self: pick-pocketing is REAL.