If you are trying to keep the line of sight, never ever use a smartphone. Based from my own experience, it can easily completely distract you for 10-20 seconds

If you are trying to keep the line of sight, never ever use a smartphone. Based from my own experience, it can easily completely distract you for 10-20 seconds or longer. Especially if you think you are "just" doing a quick thing. Then there is a notification dragging you off or something else.