DeWalt XR drill jumps into "turbo mode"

[Knotgoalie]

DeWalt DCD996 dril jumps to large power boost when bogged down. I have noticed it twice, once with 2.5"holesaw cutting hardwood and the other time it snapped .5"drill bit in two when it jammed enlarging a retainer pin hole in a trailer hitch ball mount. As the drill started to bog down there was a (guestimated 30%) boost in power. My neighbour was witness to both times and neither of us could explain it. Any ideas out there?

 

[Firebrick43]

Its defective. The electronics are supposed to see acceleration(with accelerometers) of the handle sideways and kick it out. very few drills have a mechanical clutch anymore