Storm knows how to push and pull doors open. I've even seen him in action when he pulled my roommates bedroom door open. He stood up and wrapped his paws around the door knob and turned it and then pushed it open the rest of the way. I think Sunny, Sky, and Cirrus only know how to push doors open. At least I hope that's all they know.

Storm can also open up the screen door to my balcony but he knows he's not supposed to so he's been very good about this lately.