EDIT:
Holy shit, they have a video of what's left of their town after shelling stopped: https://www.youtube.com/watch?v=v4mc5mHksl8.
(From a distance. With a camera running...)
(It can't be much worse than all the times I've smashed LiPo batteries into the ground (or a tree or another quad) at 80+mph... They only _rarely_ "vigorously discharge" as a result of that. I'm pretty careful the next few times I recharge one after a particularly violent crash...)
Can they really expose their hand to that (below the temperate at which they get a burn) with no internal/hidden damage whatsoever?
Just being near some antennas when it is transmitting can give you a very nasty RF burn. A magnetron that can damage electronics (or cause almost any visible effect) is going to do you what it does to your food.
Seriously, don't mess with high-energy RF without proper safety training. Waving around an open magnetron that could be reflecting back at you in unknown ways is incredibly dangerous.