Jack's Bullying: Jack is bullying Piggy because he is trying to talk.
"Your talking too much...Shut up fatty"
Piggy's Galsses: The boys took piggy's glasses to start a fire
Beast: Simon hallucinates seeing and speaking to the beast
In this scene Piggy is trying to talk and is telling people to listen because he has the conch. Jack is telling him that he can't and is bulling him. This shows the real world. The smart, nice people get taken advantage of and bullied. While the big, mean people pretty much rule the world.
Piggy: Piggy wondering what the other boys are doing so late