The way utah explained the situation to me, seems you bent that wheel in the same manor I bent the first one. Not an "impact drop" in the sense that most people think about "6foot drop". That was a super steep incline but your weren't jumping off it, but trying to ride down it. When you hit the bottom transition it was just too hard and the bars got away from ya or defelcted off a rock and turned 90*. (one grip pointing at your stomach and the other grip pointing forward)
Seems forward momentum with the wheel turned 90* to the direction your going + tire traction = taco'd wheel and tire pulled off the rim.
As in the force was parallell with the axle due to losing the handlebars, not perpendicular to the axle.
Dropping off a typical "6ft drop" puts the force perp (90*) to the axle (after the fork bottoms out)
I don't think ANY bicycle rim of any quality is going to take a massive side load like that no matter how much money you spend.