This investigation may be just the introduction you need to two-dimensional motion. In a twist on the classic “monkey and hunter” demonstration, students can move the rifle left and right, or even up and down, and vary the muzzle velocity in their quest to miss the monkey. (Don’t worry. We at GigaPhysics like monkeys, and we use only a harmless foam “bullet” in this demonstration.) They’ll even take a few measurements with the on-screen ruler to help them see the key concepts. Feel free to reproduce the activity guide for your classroom use.