To be honest, I have never thought about this before. You have your hands full, cant really get your elbow in the right position to hit the call button and no one else is around to help. What do you do? Do you really put the items in your hands down, hit the button then pick them back up? That’s too much effort. Why not simply kick the button that’s near the ground. Right in foot range! Genius! One question though; what if you need to go up?