At this point in the Prisoner’s first attempted escape, you might think that he would now begin to make an evasive manoeuvre, by steering the Mini-Moke away from the approaching white membranic Guardian.
However it appears the Prisoner is too mesmerised by the thing ahead of him to think about that. Had he remained inside the Moke, he would have been safe from the Guardian, because for “it” to overpower the Prisoner by suffocation, he would have had to be out of the taxi. So something had to be contrived in order for the Prisoner’s attempted escape to be thwarted. Had he remained in the taxi, and by out manoeuvring the Guardian, he would have been away in the Mini-Moke. So something had to be contrived, something hard in the sand for the taxi to collide with, thus the Prisoner parted company with the Mini-Moke, and left at the mercy of the white membranic Guardian!
Be seeing you