I work at a small company related to electronics prototyping and a colleague and I are the ones who put the components on the boards and check if there are no mistakes. The owner of the company likes to walk around and he very often comes quietly stands behind us, looks at what we are doing and then leaves without saying anything. We find this behaviour annoying because we need to concentrate and even tho he is quiet we notice he is there. What do you think we should do about this?