Though this seems to happen only in the anime, where the thoughts have mass (the trapar is made of the dreams of the dormant Coralian crust). In the manga, the limit of questions is never mentioned. The motivations of the Coralians are very different, too.
Memetic Mutation: One scene where Renton's face had gone apeshit insane when grabbed by Holland by the collar had evolved into a video called Nijiura 7.