A guy wearing red sweater is about to be thrown of a horse.
a guy is showing off in front of friends
The fact that a guy is about to be thrown off of a horse doesn't mean he is showing off, he could be about to be thrown off for any reason.
exists e1 p1 s1 s2 x1 x2 x3.(Topic(s2,p1) & Actor(s2,x1) & a_about(s2) & exists e2 x4.(of(e2,x4) & n_horse(x4) & Theme(e2,x1) & v_throw(e2)) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_sweater(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_guy(x1))
exists e1 s1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_friend(x3) & n_front(x2) & a_off(s1) & Manner(e1,s1) & Actor(e1,x1) & v_show(e1) & n_guy(x1))