My coworker was having coffee and using his work laptop at an outdoor coffeeshop in Mountain View, CA. Someone on a bike rode by and attempted grab his phone and bike off with it.
The attempted thief didn't succeed in taking the phone, but did knock the laptop onto the ground, damaging it.
The discussion was about leaving unattended valuable objects in public places. Sure, a theft can happen even if attended, or using violence, but I personally avoid increasing the chance of having something stolen by leaving it unattended.
If I would make a statistics of primary cause of remaining without a laptop among people I know, the biggest danger is liquids in glasses (that ends up on the laptops) ...
The attempted thief didn't succeed in taking the phone, but did knock the laptop onto the ground, damaging it.