I thought Jochen said that he saw Gilles coming and moved over to give him the best line.
Looking at footage with the (faint) original sound it looks and sounds exactly as it's been described many times.
Jochen Mass is going at a leisurely pace as he's on his slowing down lap, Giles however is on 10/10ths.
Jochen is taken by surprise and notice him a bit late, Giles shits down in a very aggressive way and is
very impatient to pass, on the racing line to the left.... Just as Giles floors the throttle again to pass on the right instead
jochen also moves to the right... The violent impact is unavoidable.Everything seems to happen within 1 - 2 seconds
Nothing seems to indicates a "stuck throttle", other than to the throttle stop, by Giles' foot.
Combined with Jody Scheckter's comments in the documentary clip above (@ 7:22) it all makes sense.
Giles was still very, very upset over what happened at Imola, and the fact that Pironi had qualified 0.1 sec quicker.
Jody knew Giles very well and could better than most make a qualified judgement on how Giles must have felt.
Someone asked Ari Vatanen at Race Retro some years back about which rally he remembered the most.
He replied without hesitation: " '82 Welsh Rally". He'd been disqualified because of an unintended wrong slot on
the second run through Epynt.
So he came back to his hotel room quite early, switching on the telly to watch the news,
he was devastated to learn of Giles accident and that Giles was dead. Giles was his hero in Formula 1.