I used only my own models in this animation, so no references are required.
The initial falling ball sets off the whole machine!
Apparently someone forgot to screw this shelf in properly. When the ball falls on it, it pivots and allows the ball to continue!
These wooden pegs allow the ball to bounce back and forth and continue on the course.
I wanted to see how the physics engine reacted with a chain reaction of different sized objects. (Turns out, somewhat erratically.)
When the ball hits the light switch, the lights go out!*
This is true in the play-blast, but when rendering, the key frames were not properly aligned. The lights actually go out a bit earlier. Oh well!