He was far enough away from the Sanctuary's fortress not to cause a threat to those there, so long as the two people buffering him stayed close.
In order for you to be able to view the movie, a certain amount of it must be 'downloaded' to your computer in a process called buffering.
John Carmack, author of Doom, said that if Atari "offered a dynamic cache on the RISC processors and had a tiny bit of buffering on the blitter, it could have put a reasonable fight against Sony."
While practicing yoga, you shouldn't have the frustration of constant buffering.
Phosphorus is part of a major buffering system of the bloodstream.