是英国摇滚乐队Pink Floyd演唱的一首英语歌曲，收录在专辑《Dark Side Of The Moon》中，发行于1973年。
乐队最初以迷幻与太空摇滚音乐赢得知名度，而后逐渐发展为前卫摇滚音乐。平克•弗洛伊德以哲学的歌词、音速实验、创新的专辑封面艺术与精致的现场表演闻名。
另外，《Brain Damage》中通过讲述了一个“精神病患者”与众不同的行为，借以讽刺那些所谓的“正常人”。
歌词下方是Brain Damage钢琴谱，希望大家喜欢。
Brain Damage歌词：
The lunatic is on the grass
The lunatic is on the grass
Remembering games and daisy chains and laughs
Got to keep the loonies on the path
The lunatic is in the hall
The lunatics are in my hall
The paper holds their folded faces to the floor
And every day the paper boy brings more
And if the dam breaks open many years too soon
And if there is no room upon the hill
And if your head explodes with dark forbodings too
I'll see you on the dark side of the moon
The lunatic is in my head
The lunatic is in my head
You raise the blade, you make the change
You re-arrange me 'till I'm sane
You lock the door
And throw away the key
There's someone in my head but it's not me.
And if the cloud bursts, thunder in your ear
You shout and no one seems to hear
And if the band you're in starts playing different tunes
I'll see you on the dark side of the moon
"I can't think of anything to say except...
I think it's marvellous! HaHaHa!"
