Wallet is not a good testing device. It's a common sense in a lot of people that if you see a wallet lying around on the ground, you should never pick that up.

Wallet is not a good testing device. It's a common sense in a lot of people that if you see a wallet lying around on the ground, you should never pick that up. If you do, there will be a bunch of thugs showing up from nowhere, claiming it's their wallet (it is) and there used to be 1000 dollars in that wallet (there's not). It's one of the oldest tricks.