I was driving to this earlier
Scenario:
You're lost in a blizzard.
You'll die if you don't find shelter soon.
You find a tiny cabin.
You go inside the cabin only to find its empty but seems recently occupied.
Looking through the cabin you find a pistol and pick it up.
A rough and crazed looking individual bursts through the door and says "What are you doing in my cabin!?!" and rushes toward you in a grabbing gesture.
What do you do?
Perfecting linear motion.