弹幕，在中国大陆通常指的是发在视频内容上、横穿视频内容的所有评论，不计其评论数量亦不涉其评论的内容。本文运用批判的视角，通过对弹幕视频的弹幕作为具体的案例分析与阐释，认为弹幕池犹如波德里亚所谓的“杂货店”，弹幕首先是以杂货店的广告的形式存在，它强化了视频受众对于视频持续不断的使用和消费；而弹幕作为弹幕池中的商品则以变异的全景监狱、谜语和诗歌等形式被购买与消费；在此过程中弹幕的使用者不过是获得了虚拟的快乐，却并未在媒介与受众之间的权力关系中获得较之以往的变化。弹幕通过不断地制造交流、沟通以及获得权力的形式，让其使用者获得虚拟的媒介体验与享受，而这种体验与享受的“自由”却又是以付出比传统的媒介消费更多的时间和精力为代价而得来的。

Over-laid comment in the mainland of China is usually defined as the comment that inserted on top of the video feeds. It is time-synched and flows over the frame from right to left. This essay attempts to analyze the operation of over-laid comment system in a critical perspective, compare over-laid comment pool to Le Drugstore, and argues that the comment is first perceived as advertisement from viewers, which stimulates them to use that function. Sending over-laid comment, which is heavily routinized, is like writing poetry or solving riddles in a virtual panopticon, thus the relationship between media and audience in over-laid comment system hasn't been altered. The essay indicates that the pleasure and freedom obtained from newly formed over-laid comment system will cost more than they do in traditional media.