Some old guy cut me in line at REI, and I truly hope he trips on a rock during his hike and cuts his leg open. Nothing too serious, just enough to cause a bit of physical pain for about two weeks. I also hope that the item he purchased in haste was not the correct item, that he attempts to return said item, but that they refuse the return for some technical reason and that it annoys the crap out of him. Maybe then and only then will he realize the error of his line-cutting ways.
-j