​This was a sketch of a "Rube Goldberg" machine. Hydraulics on the top were pushed by hand that intern moved a drawer slider. This pushed a tennis ball pendulum off the top and into a structure holding marbles. The marbles fell into a funnel and onto a series of ramps. The marbles then fell into a cup that changed the balance and pulled string turning another cup over with another tennis ball in it. This tennis ball rolled into a block of wood that knocked over others until driving a nail into a balloon. The goal of the machine was to pop said balloon.  Feel free to move the model around using your mouse and shift key.