If your ever in the woods with just a knife and some string and need food you can use a 4 prong spear this works for fishing and hunting land animals. Here is how to make it.
Step 1: Gather Materials
So first you have to get your materials. First you need a knife, then a nice straight stick however long you want, then you need two small straight sticks, and then you need some rope
Step 2: Shaping the Stick
Then you need to shape the stick basically shave all the outside stuff away 1 foot from the tip of the spear. Then shape the spear end into a semi point.
Step 3: Splitting the Stick
This is an easy part take your knife make a slit in the stick then take the knife put it in the stick in the stick hit a big stick on the back of the knife to split it.then do the same thing the other way
Step 4: The Sticks and Rope
Next you insert the sticks into tall it's you made then take the rope and go up and down with the rope to through the sticks then use a square or diagonal lashing to the pole
Step 5: Tips
For the spear there are different types of tips you can make for hunting different things like fish cut into it I just did a regular pointy one.