| doors that are equiped with motion sensors that will trigger them to slide open so you do not have to physically exert yourself (if such a phrase can be applied to opening a door). this is a very usefull invention and helps many handicapped and overburdened people who might otherwise have to struggle with the door.
for normal people who could easily open a door with no problem, however, these doors promote laziness. i've seen a traffic jam actually develop around the automatic doors when there are about 2 other manual doors not being used by anyone. this completely boggles my mind. i file automatic doors in the same category with elevators and escalators: they're mechanical contraptions that could possibly chop off one of my appendages and i could do fine without them.
thanks, but i'll use my hands. | 
