Ballistic Calibration

I propped a beveled wooden ruler against the thick spine of an atlas, engineering a flawless kinetic launch ramp across the hardwood floor! Precision ballistics require supreme discipline, so I selected a heavy glass marble swirled with bands of crimson and cobalt. Resting the glossy sphere inside the central groove at the ramp's apex, I used the golden tip of my serpent staff as the release trigger. With a decisive nudge, the orb accelerated down the wooden channel, whipped onto the timber boards, and struck an empty metal mint tin dead-center with a glorious, resounding DING! Truly, an impeccable trajectory under my calculated direction.