Well yeah, it had two meanings.. it was a pun. The movie actually ends up in the trash as a result of being cut short by a bad ending, everyone dying, which would actually happen to take place in the trash. Thereby making it literal in two ways.
I'm kind of surprised to have to explain that. Judging by your signature I would have figured you'd be the type to catch it right off the bat.
It's just a hypothetical joke anyway, taking nothing away from Dev's creature design. Which is excellent.