My sister in law had her purse snatched a few days ago by a passing pair of guys on a motorcycle. It happened in the morning on her way to her workplace. She said the motorcycle came up from behind, and in an instant one of the guy sitting on the back snatched her purse which caused her losing her balance, hitting the ground and got some bruises on her upper left hand. It took her several seconds to realize her purse has disappeared. The motorcycle has sped past her before her mind had caught up with what had happened. Her glasses lying somewhere and when she screamed for help it was too late. Her ID, ATM/credit cards, wallet, keys, phone all gone! She is lucky she is not badly injured. Still, though, she was vaguely annoyed that she had to cancel her cards, re-apply for new ID, etc.
I had the same thing happen to me a few years ago on my way to the church. Luckily someone saw that and gave me a ride home. I still couldn't believe why would someone snatch my purse. It wasn't a nice purse, and I was inside Bajaj (the three wheel vehicles). That time I was aware there's a motorcycle trailing my Bajaj, but I thought they just wanted to drive past the Bajaj. Then I felt someone grabbed my right hand from the left side of the Bajaj window (I clutched my purse on my right side), and before I could figure out what had happened...my purse has disappeared! It was an intense moment and I was stunned. I was mad with the Bajaj driver for not doing anything and the fact it was very dangerous as the snatcher grabbed my hand while the Bajaj was running on the traffic. Luckily, nothing too important had been taken. And there's no cell-phone either inside the purse as I don't like to receive calls when I am inside the church.
In a big city like Jakarta, purse snatching is a common crime and mostly the victims are women. It is already a very common thing that people take it as a daily happening. In most incidents, two men on a motorcycle speed up from behind a victim and the passenger on the back snatches a purse, handbag, or cell-phone. As usual the police is utterly ignorant unless you're someone from an affluence family. They are just not interested with petty crimes. What I can do to avoid this from happening again is to stay alert all the time and use my common sense whenever I go out.