I wish there was a way to practice for these events... some sort of loader hazard drill. The handful of times I've gotten into trouble with the loader, I have not responded appropriately quickly enough. I tend to just instinctively try to counterbalance the tractor with my body weight which is a pretty ineffective strategy. Once I even started to put my foot out like a kickstand.
I'm getting better at remembering to drop the bucket but I wish I didn't have to think about it.
Is there ever a scenario where it would NOT be appropriate to drop the bucket to the ground if the tractor begins to lose its center of gravity?