A snowboarder is in midair doing a trick.
A snowboarder is in the air.
the snowboarder is in midair because have to be in air to perform a stunt trick.
exists p1 x1.(exists e1 x2 x3 x4.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_trick(x4) & (x2 = x3) & n_midair(x2)) & n_snowboarder(x1))
exists p1 x1 x2.(n_air(x2) & in(x1,x2) & n_snowboarder(x1))