Scene: Student and instructor are on a dual, night cross country.
Instructor: Turns down the panel lights, "OK, you've just lost your lights, what are you going to do?"

Student pulls out a flashlight.

Student: "I get out my flashlight."

Instructor grabs flashlight.

Instructor: "The batteries are dead, now what are you going to do?"
Student pulls out another flashlight.
Student: "I get out my other flashlight."

Instructor grabs next flashlight.

Instructor: "The bulb is burned out on this one, now what?"

Student pulls out yet a third flashlight.

Student: "I use this flashlight."

Instructor grabs this one too.

Instructor: "ALL your flashlights are dead. Now what?"
Student: "I use this glow stick."
Instructor: "Sighhhhhh, just fly the plane without any lights, OK?"