A man is running down a sand covered mountain.
A man tumbling down a snowy hill.
A person who is running on a sand covered mountain is on his feet, moving with purpose and on different terrain at a higher elevation than someone tumbling down a snowy hill as that person is not on their feet and likely not moving with purpose, as well as being on colder ground at a lower elevation.
exists e1 e2 s1 x1 x2 x3.(a_down(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_run(e2) & n_mountain(x2) & Theme(e1,x2) & v_cover(e1) & of(x2,x3) & n_sand(x3) & n_man(x1))
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x2) & v_tumble(e1) & n_hill(x3) & a_snowy(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))