Jerry ... you have 2 options for a 6 lbs plane for IMAC. You can go 5S or 6S. For a 6 lbs plane 6S will usually give you 3D capabilities. So you need to decide 5 or 6 and also think medium term. I go with 5 and not 6 beacuse I also fly 10S. Anyways, in trms of lethality, a small light place into a kid's face esp the eye is 'fatal' enough. He may not die but he will lose and eye. So its about ensuring we fly at a place where there is as little possiblity of crashing on someone. That is the best formula.