It's been a few updates since I've played, but I was piloting a trusty, simple lander towards Minimus with my son today. A few times while doing a simple retrograde burn, the craft suddenly spun wildly out of control. It acted as if there was a ton of weight in the nose, which wanted to point down no matter what. SAS did nothing. I repeatedly regained control, lost it... It was a crazy unstable equilibrium. Our landing was perfect... 0.0 m/s at about 2m above the surface, engines off--and then the thing flipped and started cartwheeling end over end. I landed it after a few bounces, but when the Kerbal got out for an EVA, the simple act of letting go made the lander tip over--and it ended nose in the ground, with the legs bobbing gently up and down at a 60 degree angle. Walking nearby makes the craft tip over flat, and then it magically tips back up, legs in the air, balanced on its nose. It's like antigravity or something. We've landed on Minimus a hundred times by now, but I've never seen anything like this, or understand the physics. Anyone have any idea what's going on?