An extreme man snowboarding up side down a mountain.
Spectators think the man is crazy.
The man may be a professional snowboarder and trained to do tricks and not crazy.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & a_up(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x2) & v_snowboard(e1) & down(x3,x4) & n_mountain(x4) & n_side(x3) & (x1 = x2) & n_man(x1) & a_extreme(s1) & Theme(s1,x1))
exists e1 p1 x1 x2.(n_man(x2) & exists s1.(Theme(s1,x2) & a_crazy(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_think(e1) & n_spectator(x1))