Slipper clutch or traction control?
Not sure either would really help a tyre that can’t find any traction so hoping it was rather the very straight line and a **** load of luck.
What bike?
My Triumph was a similar hassle.
Main difference is that I knew something was wrong while still in warranty at the previous service before big end bearing said cheers.
Mechanic seemingly figured he knew better than the person who rides the bike every day and ignored my complaints.
Even when the oil light started coming on it was “oh it’s just a sensor you can keep riding we’ll order a new one”.
Long and short of it was that the oil restrictive valve had already failed by then and the engine was slowly killing itself. Only when the throttle started vibrating did they finally start to pay attention.
Triumph eventually sponsored the parts almost amounted to the cost of the bike and then also had to chip in for labour because the “dealer was going me a favour”.
'14 Hypermotard
The con-rod sheared and exited the bottom of the crank case, knocking the starter motor off. The autopsy photos are something else...
Were it not for the slipper clutch disengaging the drive, the bike would have flipped, sending me flying at 160-odd.
Thankfully I knew that I had a big gap behind me and a long straight ahead of me. I was very lucky to keep the bike upright.
Sounds like your former mechie needs a different career... Pity about your bike. :-(

