I was killing the dragon, and it had about a 1/4 health and i used tristana ult and it knocked the damn dragon out of its spawn, through the bushes behind the spawn.... it then flew around and back to its spawn, where it fully healed itself.

ive noticed her ult seems to knock champions through bushes as well.

I hate how minions regain their health like that in those situations, its fine of course if you run off and then come back, but not where something like this happens - it happens when you use Alpha Strike with Master Yi too if its not a killing blow, or the initial hit, then the minion regains health.