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 taking a math quiz in the classroom.
You cannot be flipping and taking a math quiz at the same time. You would be in motion when flipping and it would be impossible to write down your answers.
exists e2 e1 e3 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 x4.(n_classroom(x4) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & in(x2,x4) & n_quiz(x2) & of(x2,x3) & n_math(x3))