Preheat the oven to 350 degrees and prepare a 9x13 inch baking pan with a light coating of cooking spray. Set aside.
In a large bowl, combine cake mix, water, vegetable oil and eggs. Mix until thoroughly combined.
Pour batter into the prepared baking pan and bake for 25 minutes or until a toothpick inserted in the center comes out clean.
Allow the cake to cool, then using the handle of a wooden spoon poke holes over each inch of the cake. Set aside.
In a small bowl, combine the boiling water and jello. Whisk together until fully combined, then pour the jello mixture evenly over the top of the cake.
Place the cake into the refrigerator and let it cool for 2 hours.
Spread the whipped topping over the cooled cake and top with fresh strawberries as desired before serving.