Riders in the log ride throw their arms in the air in enjoyment as they prepare for the watery descent.
Excited people on a water ride with their arms up.
A water descent on a log ride is a water ride.  People who throw their arms in the air in enjoyment are excited.
exists e1 p1 x1 x2 x3 x4 x5 x6 x7 x8.(n_descent(x7) & of(x7,x8) & n_watery(x8) & n_thing(x2) & n_thing(x2) & n_air(x5) & n_arm(x4) & of(x4,x2) & n_ride(x2) & of(x2,x3) & n_log(x3) & exists e2.(for(e2,x7) & Actor(e2,x2) & v_prepare(e2)) & as(e1,p1) & Theme(e1,x4) & Actor(e1,x1) & v_throw(e1) & in(x4,x5) & in(x5,x6) & n_enjoyment(x6) & in(x1,x2) & n_rider(x1))
exists e1 s1 x1 x2 x3 x4.(Theme(s1,x1) & a_up(s1) & on(x1,x2) & with(x2,x4) & n_arm(x4) & of(x4,x1) & n_thing(x1) & n_ride(x2) & of(x2,x3) & n_water(x3) & n_people(x1) & Theme(e1,x1) & v_excite(e1))