aerobat77, have you ever flown a swept wing airliner?
If high devices are retracted below the +1G buffet boundary, there will only ever be one result.
Are you eluding to a stall or a crash there Beagle? I'm sure a configuration stall or a 'premature high-lift device retraction' has occurred many times. If you're accelerating enough you may well get away with it, which is why they don't all end in a Staines-Trident type event. In addition, if you spot the 'inadvertent' retraction in time and reverse it, you'll fly away. Indeed G-ARPI was not doomed the instant the leading edge droops were retracted. Had the selection been reversed in time then they would have safely flown away.
And this result would happen at the end of the runway in this scenario, not 70 seconds later...
Well not necessarily. I'm not familiar with the TU154 slat/flap system, but certainly on other types with a combined slat/flap lever you may well be accelerating quickly enough not to stall until the slats start retracting. That will often be after the flaps have fully retracted and so perhaps 20 seconds or so after the initial slat/flap lever operation. If the call to raise the 'gear' was quite leisurely then an inadvertent slat/flap retraction could well result in an impact only a mile or so from the airfield.