Coolant spray

The coolant spray in Metal Gear Solid 2 is used to defuse all the bombs that Fatman has placed around the Big Shell. Since the bombs cannot be defused by Snake and Raiden, who are amateurs, they must be frozen as a 24-hour temporary measure to avoid any immediate danger. It is also because Stillman has a prosthetic leg, which means that he cannot get around by himself too easily and has to lock himself in the pantry to give advice and guidance to Snake and Pliskin via Codec.