i'm working on a nail-holder gadget, that helps hammering a nail to the wall.
by mistake, i came up with a nice trap mechanism, that can catch a Majorette toy-car in a split second, on a hard flat surface.
i now want to develop it to a level of catching dog-poo on a sidewalk, and being environmentally friendly.
behold the 0.0.1 version
[sorry. video erased !] thanks bonfil