Linking frames mystery

Someone showed me 2 linked closed paper frames. He claimed it was folded.
Question:
Is it possible to fold 2 open rectangles into each other or is trickery involved?
If it can be done, what fold(s) should be used?

You mean 2 closed rectangles? I think the answer lies in your username.

First aliens, then questions about counter strike pc game and now folding paper rectangle frames

there must be something in the air…

Good thing I took a deep inhale of fresh air this morning here is the answer:

Scissors and glue