Invisible Billy Adventures is a baby show-type deleted scene.
The story is that it looks to be one of Billy's friends say "Hey, Billy, catch the frisbee!" Then the guy proceeds to throw the frisbee and while it is souring in the air a little bit of blood shows and then you hear a sound that goes BANG and that was billy flopping on the floor then his friend yells "B-Billy?!"
Singing men : Invisible Billy Adventures !
Unscreen Kid : Hey billy, catch the frisbee!
(The frisbee is thrown and kills Billy, who then flops onto the floor)
Unscreen Kid : B-billy?!