For about a week I kept trying to fix a very sneaky "death roll" problem with my new build, the Quadrysteria Rush 5". After a few modifications to the firmware in BLHeli, careful flights, flips and rolls I found that the copter was "cured". So on this day I went and flew as I would normally around my local park. I was able to capture all of this video (flew approximately 5 packs that day), but somehow the death roll snuck up on me again, this time as I did some rolls high over the basketball court! The damage cost me over $200. Truly a sad moment, specially since I was just starting to enjoy this brand new quad. For now its been sitting on my bench until I can dig it all up and re-build it. And then I'll be back to searching why this happened and most importantly, figuring out a fix to prevent it from surprising me again! :(