He wants to get out and explore...that's what that is. Just see if he will let you pick him up. He may hiss if he's not into it. I usually pass on handling when they get all active like that. I let mine roam about the cage and let him try to do his escape artist routine. I usually handle my BP when he's more chilled out and laid back. It's funny...I can read him pretty good after 2 years. Yours sounds like he may want to get out and stretch a bit.