The Showtime has a tendency to do that. The elevator throw between low and 3D rates is a really crappy spot, and it will make the plane "snap" even while the plane isn't stalled. It's a characteristic you have to watch out for. IMO, the Showtime 90 is a really good all 'round model, it just has that one bad tendency. I was able to correct this bad habit, but I don't think it will help you now.
Sorry for your loss.
Why is the plane discontinued?