Cryogenic weapons seek to disable a target exposing it to extreme temperatures below 238°F ( ?150 °C/123 K) that can damage organics and cause mechanical parts to seize up or shatter. Cryogenic liquids, such as liquid nitrogen, hydrogen, or helium are often utilized. In extreme cases, helium super-fluid can be used when the liquid helium is stored at both extreme temperatures and pressures. Such weapons are often not lethal as long as prompt medical intervention is available, though exposure to cryogenic weaponry in organics can cause hypothermia and possible need for amputation in the case of severe frostbite in extremities. Forms of cryogenic weapons can vary; some fire globs or streams of cryogenic fluid, and some can produce solid powder or crystals that have cryogenic temperatures.