New K'NEX Ball Machine Element - Trapdoor Arm

Hey everyone! I built this new K'NEX element the other day, thought I'd share it with you all! I call it the Trapdoor Arm. I have not featured it yet in one of my own ball machines, but the element works fully reliable as far as I know. I hope you all like it!

-XxdodoknexX-

PS. If anyone has the time: there might be a way to make this design stackable. Just an idea :)