...he was shooting from a height and the stuff on the pad was the mathematics involved in calculating how high to shoot over the crowd.
How do you aim dead on a 45 degree target?
For a target 45 degrees up or down, multiply the actual distance by 0.7, set your scope elevation for this distance and aim dead-on; When the target's 30 degrees up or down, multiply its range by 0.9, set your scope for this distance and aim dead-on; If the target angle is less than 30 degrees, aim dead-on.
...us imbeciles with a shortage of math skills will just climb up a hill and roll rocks at ya.
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