hi-- i'm taking calc-based physics I (undergrad). i'm supposed to give a short presentation and write a paper on a physics topic for my class. something that relates to physics I - particle and rigid body kinematics and dynamics, work and energy, momentum, static equilibrium, and gravity. i want a creative topic that spins off from the course content..something that will not only keep my classmates awake during my presentation, but maybe even get them excited a little bit. any ideas? even cooler if there is a hands-on or demo component. thanks!