Sacred:1.21 Gigawatts?, Great Scott!
One of the humorous messages that may be displayed during the startup process.
Back To the Future
When Doc Brown asks Marty how much power it requires to start up his flux capacitor, the answer is 1.21 gigawatts. This is roughly the amount of power generated by a lightning bolt.
The "Great Scott" Doc Brown is referring to is most likely the Arctic explorer Robert F. Scott.