I followed a similar kind of person driving a similar kind of vehicle through the burbs towards Milford one morning. For about 2 kilometers they achieved a maximum speed of 25kph, and slowed at every intesection joining the main road we were on and all but stopped at one of them for no reason. Then when we arrive at a traffic light controlled main intesection severe indecision reigned surpeme. Finally a lane was selected and we progressed through. Heading out of this busy intersection and into the busy main street of Milford she starts veering to the right, so I assumed (wrongly) that she was going to turn right into a side road. How silly of me! She then drives up the wrong side of the road until she gets to the pedestrian crossing outside (with safety islands in the middle of the road) the New World. I'm now along side her giving it loads on the horn. She is now on the crossing and decides that maybe she hasn't quite got it right so then turns right angles to the road and drives across the crossing! Now she's behind me at the red lights. So I jumped out, ran up to her door, wrenched it open (much to her surprise) and give her a serious ear bashing. To which she replies "Sorry, sorry, sorry, sorry". My parting shot was "You need to pull your car over and stop driving right now, because you're sh*t!"
I should have grabbed the keys and thrown them away.