Probably just a heavily bearded hipster wearing a trendy bunny suit (ponies are so last year) practicing his keyboard chops for the new $10,000 vintage analog synth he ordered from ebay to make him popular.
O wouldn’t worry much...unless he comes to the door. Then dear God, DON’T FEED HIM!!!!
Great, now the movie Donnie Darko with the rabbit suit dude came to mind.