It is not uncommon for the Olympic flame to be accidentally or deliberately extinguished during the course of the relay, and on at least one occasion the cauldron itself has gone out during the Games. To guard against this eventuality, multiple "versions" of the flame are transported with the relay or maintained in backup locations. When a torch goes out, it is re-lit (or another torch is lit) from one of the backup sources. The cauldron and the pedestal it sits on are always the subject of unique and often dramatic design.
The 2008 Olympic Torch Relay