You just get the idea you need to be in the wilderness (whatever is local - hot, cold, dry, wet, etc). You can pick anything up you want on the way out, but you can’t stop walking out the door.
How long do you reckon you would make it living off the land? Any special circumstances or tools that would have helped?
In winter, I would be lucky to make 48 hours. In warm weather I could probably last a week. Grabbing a blanket, knife, water bottle, and hat on the way out the door would delay the inevitable by a few days.
Anyone thinking they could survive easily needs to remember the survival Rule of Threes:
3 minutes without breathable air (unconsciousness), or in icy water.
3 hours without shelter in a harsh environment. (Including sleeping outdoors uncovered on a cold night, IMO.)
3 days without drinkable water.
3 weeks without food.
Dehydration will get you faster if you drink contaminated water from a stream and pick up giardia or some other infection that causes diarrhea.
Not to mention the earth is a huge heat sink, sleeping on the ground without insulation will make you very cold very quickly.
That’s why you sleep on your shins and forearms in an upright fetal position. Maximizes skin-to-skin contact for your full body, and minimizes heat transfer to the ground.