My Morkie Belle does strange things quite often. She does what I found out are called zoomies. They just come from no where. All of a sudden she's off with no warning we just have to be alert to get out of the way.
Our other furbaby is our Lab/Springer mix who is 11 years old. When we brought Belle home for about 2 days he was like "what did I do to deserve this?" Belle adopted him immediately, or mainly his tail! She follows him everywhere so that when he sits or lays down, she can lay on his bail. She won't chew on her chewie things unless she can be on his tail. TJ (lLab) loves to just keep getting up and moving just to irritate her. Lately Belle has decided that our couch pillows should have no stuffing in them! Nothing makes her happy than to be surrounded by an ocean of pillow stuffing. Belle also likes to sleep on her back by me on the couch but her head has to be hanging over the edge of the couch. She surprises us almost daily with the strange things she does. Usually they are something she is going to get in trouble for but I guess she feels it's worth it.