Absolutely gutting. 

BUGGAR!!!

It was a really nice model. Such a shame. Good for flying it at least once.

What a crying shame that happened. All that work and detail to end up like that. I hope he rebuilds it.

Looks like he overbanked it. It looks like it stalled then rolled further to the right in the stall and became unrecoverable from that height.

They didn't show the engines being started but I guess they were electric.

Obviously FOD wasn't a concern, taxying and taking off with the engine nacelles brushing against the grass like that. You'd never get away with having the engines of the real aircraft being so close to a surface like grass even allowing for scale, nor I suspect even with model jet engines.

The real engines will hoover up stuff off the runway especially at low speed and high power. On wet runways you can see the water being sucked up into the engines during the early part of the takeoff roll. Operations over grass would suck up every loose bit of debris sitting in the grass. This was one of the reasons why the runway at Auckland was widened to accommodate the A380 to ensure the outboard engines were not out over the grassed areas to the side of the runway.

Beautiful model, such a shame. 

Tip stalling with tapered wings is so easy. Don't ask me how I know!