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 performing stunts for an audience.
Flipping in the air, upside down does not necessarily mean performing stunts.
exists e3 e2 e1 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 x3.(n_man(x1) & for(e1,x3) & n_audience(x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_stunt(x2))