few more seconds delay will save your life...
ie: few days before 911, I heard someone was runing from behind, I turned back and tried say hello when I was finish my day of work... I saw 2 face-covered youth were running towards me... I yelled to my wife who was 5 meter front of me to run and ask for help... my wife had yelled and drew attention... help was running towards us... I survived with 14 stiched on my head...
if my sense was not layed out far, I might have more damage...