Also I think it was you who suggested the having a large cart thing as a collision warning protection measure. (For me, it does not work because I do the body-sense thing that one also sometimes does with cars, so it is like "suddenly I have to maneuver and I am become very large and unwieldy." I tend to instead small basket and rudely dodging around people. Sometimes I think about how rude I am and am embarrassed, but if I try to do the spatial avoid collisions awareness and the everyone is people and social awareness at the same time, it is a meltdown, woe! So usually I am just rude)