A close friend of mine was having her lunch at a terrace near La Rambla in Barcelona. A woman came upto her with a huge map of the city and started asking for directions.
My friend took her time in helping the woman out. Nothing seemed out of the ordinary and she walked away. After a while, when it was time for my friend to leave, she realized, that her cellphone was missing.
She had kept it on the table and that woman took the cellphone while she had covered the table with a map.