There are a few exceptions to this rule. For example, the same progressive red lights on Kitt in Knight Rider were good, but bad on the Cylons in Battlestar Gallactica. For the most part, however, red blinking lights mean a bomb or an evil android. If a light is any other color except red, and then turns red, it either means that something is about to explode or something has turned evil. A recent episode of Terminator: The Sarah Connor Chronicles indicated that even those skilled at bomb detection and disarming (indeed, those charged with saving the world) can be fooled into thinking that something with a blinking red light is a bomb. It’s a natural reaction. The lights are especially bad if they blink, but even a steady red light should indicate that there may be trouble ahead. If only Dave in 2001 had heeded the red-light warning about Hal before it was too late. In general, if confronted with a red blinking light or a light which changes from any other color to red, first see lesson #2 (loot any dead bodies around you to arm yourself) and then run. This especially applies to stop lights and brake lights.