today this lorry really basket

it's civilised & common sense to what the road merging signs are for right? perhaps this retard din understand what the signs are for. perhaps what goes on in his head is that since he sees a P-plate, it is natural reaction for him to rev up from my back, come to my left, squeeze to the front, when the road was already merging and becoming narrow. ok fine, i let him. but i really had to vent my dissatisfaction, by flashing my high beams for quite Several times (ok kinda rash but at least it's not reckless).
so now we were on this 2-lane expressway leading to KJE. the right lane. so i'd already let him win, he was now in front. shouldn't he have had his fill of smugness and lawfully move to the left when all was clear, instead of road hogging there at 80 in his bloody lorry?! so, i know what he was up to. fine lor, i flashed a few times again, stayed put, and tagged along, W/O tailgating. but really feel stupid when cars from behind started overtaking us by the left. ok i lost this game of patience, and overtook him by the left.
almost immediately when i landed up in front of him, that he started changing lane to the left...
FLABBERGASTED