A child jumps upside down on a trampoline.
A child falls off a trampoline.
A person cannot be on a trampoline and fall off it at the same time.
exists e1 s1 x1 x2.(r_upside(e1) & a_down(s1) & Manner(e1,s1) & on(e1,x2) & n_trampoline(x2) & Actor(e1,x1) & v_jump(e1) & n_child(x1))
exists e1 s1 x1 x2.(a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_fall(e1) & n_trampoline(x2) & n_child(x1))