You know, if you're trapped outside the space craft and left to die, the last message you ever write could be graffiti written in a vacuum on some passing objec

You know, if you're trapped outside the space craft and left to die, the last message you ever write could be graffiti written in a vacuum on some passing object. You want a pen that can write in a vacuum. Now, I'm sure you're saying, perhaps the pen could come with a microburst of thrust instead, to save said astronaut. Now you're just being silly.