Only once for me. I was having a bad day and this foreign driver cuts to the front of the line at a truck stop in front of about 10 guys. I told him to move his ass to the back of the line and wait like everyone else. He says in crappy English hes only going to be a second and i told him I didn't give a shiit move to the back. At that point every one else in line starting climbing up his ass too.
