Goal:
To cut glass bottle to make into a cup.
Answer:
Make a homemade glass cutting lathe

Goal:
Clean the bathtub.
Answer:
Fill it with water, soap and vinegar .. let it soak until clean then rinse.

Goal:
How would I use a Sharpie to draw on a Batman mask made of duct tape?
Answer:
Take the top off of the Sharpie marker and use the felt tip to draw by pressing the tip on to the duct tape and dragging it to create the necessary shapes.

Goal:
How should you tighten knots when making a Paracord Cross?
Answer:
Use needle nose pliers to pull the cord tight.