A boy in a gray sweatshirt is laughing while someone helps him put his foot over his head.
The boy is laughing at his stupid friend.
There is no indication that the boy is laughing at a stupid friend, just laughing.
exists e1 p1 s1 x1 x2 x4 x5.(exists e2 p2 x1 x3.(exists e3.(over(e3,x5) & Theme(e3,x4) & Actor(e3,x1) & v_put(e3)) & n_male(x1) & n_male(x1) & Recipient(e2,p2) & Actor(e2,x3) & Topic(e2,x1) & v_help(e2) & n_person(x3)) & n_head(x5) & of(x5,x1) & n_foot(x4) & of(x4,x1) & n_male(x1) & while(e1,p1) & Actor(e1,x1) & v_laugh(e1) & in(x1,x2) & n_sweatshirt(x2) & a_gray(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 s1 x1 x2.(n_friend(x2) & a_stupid(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_boy(x1) & at(e1,x2) & Actor(e1,x1) & v_laugh(e1))