Wait a tick.

You charged up and expelled poison in one turn (Through your buttocks, which I don't read anywhere in your CS of him being able to do that. Because its connected to your mouth.), and you're assuming that a dose is capable of immediately incapacitating a bear that has zero requirements to breathe(Stated in my CS.). Which he wouldn't be doing through his mouth, which is firmly closed around your hindquarters. Or breathing period, because this place stinks of evil and bloodshed.