Accidents

Don't put your feet on the dashboard¹⁾.

Or put your any limb outside the car window. You go look up the x-ray photos on google.

Pass tools (knives, guns, nail guns, etc.) to others business end downwards and away from them (and you).

People make more mistakes when they get tired, in a routine and zone out, or simply don't Awake, Stop, Context Switch, Observe, Assess, Prepare, Operate, Breaks, Leave the area safe for the next person. (ASCOAP OCS?)