Learn a useful skill, and leverage roadkill for fun and profit.
A companion to How to Cook a Snake.
Step 1: Acquire Snake
Snakes do a fine job keeping the world free of unnecessary rodents; don't kill them unless absolutely necessary! That said, if you do kill a snake, or find one dead, don't let it go to waste.
The snake in this Instructable was run over by a car; Eric found it a couple minutes later, its heart still beating, in the process of expiring by the side of the road. Since we knew both time and cause1 of death, and refrigerated the carcass promptly, it was safe to eat. If you just want the skin, the time and mechanism of death isn't as relevant. Just be sensible, and make sure to clean yourself (and the snake parts) up properly.
A bit of internet research identified it as a probable Black Rat Snake, a non-poisonous Indiana resident.
1 Note that snakes can also die from eating poisoned rodents. You dont want to eat a snake dosed up with warfarin or other toxin2. Pay attention to context.
2 It's apparently fine to cook and eat poisonous snakes- cooking is sufficient to inactivate any venomous residue.
Step 2: Off with its head!
You can use a nice sharp knife, or a pair of kitchen/poultry shears. Just stay away from serrated knives, as they don't do very well with snakeskin.
This is also the time to make sure you've properly prepped your area- I put a large cutting board on top of several layers of newspapers in the driveway, and put a wad of paper towels and a plastic bag for trash nearby.
Make sure to leave space for your implements, and bring bags and/or a bowl to save the good bits. If your mother is willing to take pictures that's a bonus!
Step 3: Find the vent
This is an opening a couple of inches away from the tail, on the ventral (belly) side of the snake.