A biker jumping extremely high.
A biker is jumping and laughing.
Just because a biker is jumping extremely high doesn't imply laughing.
exists e1 p1 x1 x2.(a_topic(x1) & exists s1.(r_extremely(s1) & Theme(s1,x2) & a_high(s1)) & Topic(e1,p1) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_biker(x1))
exists e1 e2 x1 x2.(Actor(e2,x2) & v_laugh(e2) & n_biker(x2) & Actor(e1,x1) & v_jump(e1) & n_biker(x1))