Sheldon: The 'Check Engine' light is on; we need to find a service station.
Penny: No, the light's been on since I bought the car.
Sheldon: All the more reason to consult with a mechanic before it explodes!
Penny: It's not gonna explode, just keep driving. Warp speed ahead, Mr. Spock.
Sheldon: Mr. Spock did not pilot the Enterprise, he was a science officer, and I guarantee you that if he ever saw the Enterprise's 'Check Engine' light blinking, he would pull the ship over immediately!