Oh, okay:

1) One of the climbers gets loopy and belligerent from the high altitude.

2) The mama bear is still in the woods nearby, and still pissed off.

3) One of the frostbite victims started out already dehydrated, and has now become hypovolemic, and is now starting to go into hypovolemic shock.

4) One of the fallen tree's limbs is impaled through one member of the couple, right next to a major artery.

5) One of the rockslide victims gets a subdural hematoma.

6) The car driver went over the edge due to a grand mal epileptic seizure.

How's that?