A few men are shown flipping in the air, upside down, as a result of using a contraption that is on their legs.
The men are swimming in the ocean.
You cannot be swimming and flipping at the same time.
exists e3 e1 e2 p1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(n_leg(x7) & of(x7,x2) & n_thing(x2) & n_air(x2) & for(e1,e2) & as(e2,x3) & Theme(e3,x5) & Actor(e3,x4) & v_use(e3) & on(x6,x7) & (x5 = x6) & n_contraption(x5) & (x3 = x4) & n_result(x3) & r_upside(e2) & a_down(s2) & Manner(e2,s2) & in(e2,x2) & Actor(e2,x1) & v_flip(e2) & Theme(e1,x1) & v_show(e1) & n_man(x1) & a_few(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_ocean(x2) & n_man(x1) & in(e1,x2) & Actor(e1,x1) & v_swim(e1))