If you make a lean to out of branches and leaves
You spend a couple of hours constructing a primitive man style lean to out of mud, branches and leaves, it blocks the wind pretty well, it's big enough to sleep in, and after all that work you could use a nap so you fall asleep inside your lean to while a army of squirrels gathers outside. Your sleep is broken by them throwing twelve acorn grenades into your lean to, they explode into chemical heat all over you, burning you to the bone in places, you stumble out of the lean to screaming to face wave after wave of charging squirrels with spears, they bury the weapons into your legs and ankles, tossing spears into your crotch and belly, you fall and they begin stabbing you, dozens of stabs at a time until you are dead and unmoving.
