If you drive a piece of garbage Nissan Almera, and when following a Signum 2.0T for a mile along residential roads you:
a) Tailgate so stupidly close to the Vauxhall's bumper that the driver can't even see your bonnet, let alone the headlights or the reg number;
b) And weave about the whole time, as if trying to intimidate the Vauxhall driver into pulling over into a bus stop layby to let you past (yea like that's going to happen), despite the Vauxhall not exactly hanging around in terms of speed;
c) And when the Signum turns right at a large roundabout that leads to a dual carriageway you don't even wait to get to the dual carriageway instead you insist on trying to force your piece of poo 1.7m wide Almera into the 0.8m of space between the offside of the Signum and the railings that go around the roundabout;
d) And when the Signum enters the dual carriageway you don't bother to wait and see what speed the Vauxhall driver is going to proceed at, you just assume that you're going to be able to go fast enough to overtake it so you immediately get into the overtaking lane;
THEN, the lesson to be learned is that the Signum driver is going to wait until your front bumper is adjacent to his rear passenger door before he then floors the accelerator and leaves you for dust, and looking stupid in the overtaking lane but with no one to overtake because you're a rubbish driver in a rubbish car.
Furthermore, the Vauxhall driver, before he gets too far ahead that you can't even see his car anymore, is going to have the temerity to wave goodbye at you through his open window so that you know for certain that he drove at that speed JUST because you were a stupid driver, and not because he was going to anyway regardless of how you had driven.
Let that be a lesson to you, NissanMoronDriver.