Another case where experience was insufficient. Too much power applied on a touch and go, IIRC. 
http://www.vcstar.com/news/man-killed-in-camarillo-plane-crash
What you describe sounds like a typical Mustang landing occurrence.  A balked or bounced landing attempt followed by a pull on the stick to arrest the descent rate as airspeed is bleeding off toward not much margin above stall speed, accompanied by a quick application of power.  All of this occurring at the same time results in a stall with torque and the resulting roll to inverted with no altitude to recover.