The dog is briefly threatened with a knife (he squirms and makes scared noises), and then he gets locked in a bathroom and is not seen again, but there's no reason to believe he dies.
Man hides in closet. Dog is locked in closet. ----- SPOILER ----- SPOILER ----- SPOILER ----- A girl is helplessly strapped into a seat in a small plane that's about to fall from the top of a cliff. It triggered my claustrophobia.
Around 19 minutes in, Bobbi vomits immediately after accidentally throwing a knife into JJ's leg. It's pretty gross and is then shown again in the end credits (look away when you see "written by Jon Hoeber & Erich Hoeber").
Carlos and Todd are shown running from a bomb. They're not shown again, but since Bobbi is the same distance from the bomb and escapes unharmed, we can assume they survived.
Kind of. The following happens: A plane falls from the top of a cliff and explodes when it hits the ground, and a man who fell from the same place just after the plane drops into the explosion, disappearing in the ball of flames. He dies, obviously, but whether it's technically from the fall, from the explosion or from the flames I couldn't say.