Good observations...this happened in Israel. As to motivation...who really knows what the 'readout' was.
These 'tunneling' incidents are not uncommon...it brings to mind the one Laird and his family came up against in an underground subway passage in Canada, and how the quick thinking of Laird with the right 'words' and concealed weapon [knife] back up...saved the day.
Alleys are best avoided at all cost...but if absolutely necessary...one must walk in 'condition orange' [deadly violence impending] every step of the way...and able to deploy the right weapons at close quarters battle.
The very best weapon and 'tactical deployment' of such is this item
Load this with + P _rounds...and carry it concealed in your jacket pocket or pants pocket...if you need to walk 'tunnels'...and wrap your hand around it.
The 'snubby' is hammerless so it can be fired from your pocket at contact range with an assailant_without jamming.
No need to pull the gun out of your pocket at all.
An alternative is this http://store.kimberamerica.com/Products ... fault.aspx
You keep it in your right hand[almost totally obscuring its shape] to your ear as if talking on a cell phone, finger inside the trigger guard...and you might just get a chance to escape serious injury or death.
The biggest problem is that if someone wants to really kill you...he will always find a way to get to you while unaware.