A boy jumps off a short wall with his arms out.
A boy is pretending to fly by jumping off a wall.
Just because  A boy jumps off a short wall with his arms out does not mean he is pretending to fly.
exists e1 s1 s2 s3 x1 x2 x3.(a_out(s3) & Manner(e1,s3) & a_off(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & with(x2,x3) & n_arm(x3) & of(x3,x1) & n_male(x1) & n_wall(x2) & a_short(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_pretend(e1) & exists e2 e3 s1 x2.(by(e2,e3) & a_off(s1) & Manner(e3,s1) & Theme(e3,x2) & Actor(e3,x1) & v_jump(e3) & n_wall(x2) & Actor(e2,x1) & v_fly(e2)) & n_boy(x1))