Of course I do. Too bad my depth perception seems to have a certain lag in these cases, as I normally find out that that moving thing I saw in the corner of my eye is actually not all that close. That, and I sometimes forget, resulting in an awkward lunge to keep the door open 
They have trained me well, to the point where my body moves before I even realize it :B
They have trained me well, to the point where my body moves before I even realize it :B