This was shared by email at my work a short while ago, and was a real eye opener to me and my colleagues. As teachers, we all must wear lanyards at all times to prove our identity within the building. Plus, we nearly all carry our classroom keys on them for the sake of ease. Add to that a plethora of badges and trinkets from children, and they make for a fairly compact and sharp weapon.
Thank you for the reminder to remove your lanyard before you drive!
(The cynical side of me says, “As a very short female driver, my air bag will probably kill me anyway 
without the extra help, but I will try to keep remembering to remove the lanyard first!”)