Bag snatching is mugging, isn't it?
My mate lived in Barcelona near some bag snatchers. They'd often just take the cash and sling the bags out into the garden. We had a nose around and found one with a passport in so decided to be good citizens and take it to the cop shop. I decided to be a bad citizen and keep the rather nice bag
So, queuing in the police station to hand in the passport and the owner was only standing ahead of us, waiting to report it stolen
Naturally, I took my stuff out of the bag and handed it over also. She was so pleased to see her passport that, apart from a confused frown, she didn't question the bag business.
Not my finest moment, but strangely not so bad.