Someone riding sideways on a motorcycle.
The rider is getting ready to leap off the motorcycle.
We do  not know if the person riding is the driver or a passenger. We can not infer that because the rider is riding sideways that he is about to jump off. People stand on balconies- it does not mean they are all going to leap to their death.
exists e1 x1 x2.(on(e1,x2) & n_motorcycle(x2) & Actor(e1,x1) & v_sideway(e1) & n_riding(x1))
exists e1 p1 x1 x2.(n_motorcycle(x2) & n_rider(x1) & exists p2 s1.(Topic(s1,p2) & Actor(s1,x1) & a_ready(s1) & exists e2 s2.(a_off(s2) & Manner(e2,s2) & Theme(e2,x2) & Actor(e2,x1) & v_leap(e2))) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1))