This is explained by Bun - Bun during the flashback so as to torment Jeff about his problems with his dad .
A yellow marshmallow bunny named Bun - Bun used to sneak into Billy 's room when he was a baby and tormented him with real spiders .
This is explained by Bun - Bun during the flashback so as to torment Jeff about Billy 's problems with his dad .
A yellow marshmallow bunny named Bun - Bun used to sneak into Billy 's room when he was a baby and tormented him with real spiders .