A bicyclist performs a stunt on a ramp, going into the air while twisting.
The man is riding a dirtbike.
The bicyclist may be a child and not a man.  The bicyclist may be a gender other than male and so not a man.  The Bicyclist may not be on a dirtbike.
exists e1 e3 e2 x1 x2 x3 x4.(n_air(x4) & while(e2,e3) & Actor(e3,x1) & v_twist(e3) & for(e1,e2) & into(e2,x4) & Actor(e2,x1) & v_go(e2) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & on(x2,x3) & n_ramp(x3) & n_stunt(x2) & n_bicyclist(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_dirtbike(x2))