This song finds an anxious Thom Yorke recounting an alarming and lonely journey in which he is frightened by the coldness of the society he encounters. After stepping off the train, the singer is close to a panic attack. Glass-eyed (close to tears), Yorke escapes to nature not caring where he ends up.
The themes of paranoia, alienation and feeling like an outsider is a frequent theme on Radiohead tunes; other examples include "Climbing Up The Walls
," "Subterranean Homesick Alien
" and "Paranoid Android