For possibly being followed
For possibly being followed Hearing footsteps -also how fast. Sudden change(s). How many peoples footsteps. Watch shadows -If you're lucky the followers shadow will go in front of yourself and then also beyond yourself, so you can see him coming -And it's also possible to just look to the side and then with the eyes more backwards to see how far a shadow is and in what angle if possible. When going around a corner it's possible to look sideways and backwards by looking to backwards with the eyes. - Using reflections -Windows for example