Order of the Stick Trivia XXIV: What do I need a twenty for, anyway?

[enq]

stealthy approaches to dangerous areas. Also advantageous for lovers wanting to get intimate in creative ways.

Not going to formally contest this but I'm curious if other people would consider this being incorporeal. Gas is still matter, whereas I don't think ghosts are considered to have mass in the physical sense. Then again... ectoplasma?