Finding an Old Toss Up Robot Video

Hey guys, does anyone remember seeing a Toss Up robot that just had one rotating arm in the center of it that it would use to pick up a buckey ball, then it would spin faster and fling the ball? It could only handle one ball at a time, and it had two ends to the arm so they balanced each other out? Here is a rough sketch I drew from memory. I tried to find the video on youtube but didn’t have any luck.