something green in the corner

One night I woke up to a loud gasp coming from my wife I open my eyes and she is sitting up staring at the corner of the ceiling.

Me: " what is it?"

Wife: "there is something green hanging from the ceiling?"

Me: " what?"

Wife: "There is something green hanging from the ceiling"

Me: (looking up in the corner) "Um...ok"

Wife: "I'm serious it's there in the corner"

Me: (laying back down) "Well it's not there anymore"

Wife: (laying back down) " I thought we had taken them all down"

Me: " um.... well I guess we missed one"

Wife: " Yeah"

I am still trying to figure out what she was dreaming about and what the green things were.