If the animal jumps out of the vehicle, or the truck is in an accident, the animal could be injured. 
An animal is jumping out of a vehicle.
WE DON'T KNOW THAT THE ANIMAL IS JUMPING OUT OF THE VEHICLE. WE ARE JUST PROPOSING A SCENARIO.
exists x1 x2 x3.(n_animal(x1) & n_animal(x1) & n_truck(x3) & n_vehicle(x2) & ((exists e1.(r_out(e1) & of(e1,x2) & Actor(e1,x1) & v_jump(e1)) | exists p1 x4.(in(x3,x4) & n_accident(x4))) -> exists e2 p2.(exists e3.(Theme(e3,x1) & v_injure(e3)) & Topic(e2,p2) & Actor(e2,x1) & v_could(e2))))
exists e1 s1 x1 x2.(a_out(s1) & Manner(e1,s1) & of(e1,x2) & n_vehicle(x2) & Actor(e1,x1) & v_jump(e1) & n_animal(x1))