| Released | June 2, 1972 |
| Recorded | February 23 - April 6, 1972 |
| Genres | Progressive rock |
| Studio | Château d'Hérouville, Hérouville-en-Vexin, France |
| Length | 2:18 |
| Label | Harvest |
| Songwriters | Roger Waters • David Gilmour • Richard Wright • Nick Mason |
| Producers | Pink Floyd |
Overview[]
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- This song, along with Obscured by Clouds, was played live in late 1972 and usually opened shows on the 1973 Dark Side of the Moon tour. The live performances were often an extended version which allowed David Gilmour to perform a guitar solo and Rick Wright to add a Hammond Organ and Mini-Moog solo. * The title came from a catch phrase used by the band's former road manager: "I'm in. And when you're in, you're in."
- The song was also covered by the progressive metal band Tiamat, as a track on the Signs of Life Pink Floyd tribute album among others.