Self-contained breathing apparatus pressure changes with ambient temperature. As temperature decreases, the pressure inside the cylinder decreases. The relationship between the temperature and the pressure of a gas is defined by the formula "PV" = "nRT". (See Universal gas constant.) What is particularly important to understand from the formula is that the temperature is in kelvins, not degrees Fahrenheit. Consider the freezing point of water at 32 °F (0 °C, 273.15 K) and compare it to 96 °F (35.6 °C or 308.71 K; normal human body temperature is 37 °C). While 96 is arithmetically three times 32, the difference in temperature from a
Centigrade (film) before he burns inside. Colin Cunningham describes the movie as follows: ""Centigrade", in a nutshell, is about a guy who lives in an old dilapidated, busted-up trailer. There's no wheels on it. It's just laying dead in the weeds. [The owner] does a bad thing, and he wakes up in the morning and [the trailer is] rolling down the highway. It's being towed by a big, black pickup truck. The doors won't open and the windows won't break and he can't get out. That's essentially what it's about. It's about a man trapped." The part of the main character was