A Mars Landing is performed in the dark by transferring the burning remains of your joint to the tip your burning cigarette so you don't burn your lips. As you make the transfer, the small, glowing joint looks like it's approaching a larger glowing orb, like the "red planet" Mars.
"Damn. I'm burning my lips. You got a clip for this joint?"
"No. But you can put it on my cigarette."
"A Mars Landing. Good thinking."