A skier is coming down a hill.
Skier going down a hill.
coming and going down is the same thing in these sentences
exists e1 s1 x1 x2.(n_hill(x2) & Time(e1,x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_come(e1) & n_skier(x1))
exists e1 s1 x1 x2.(ne_nam_skier(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_hill(x2))