A guy riding a bike in the street doing a pop-a-wheely.
A guy doing tricks on a bike.
Just because he pops a wheelie doesn't mean that he is doing tricks on a bike; doing tricks infers that he is doing it for the purpose of entertainment or money and is doing more than a single trick.
exists e2 e1 x1 x2 x3 x4 x5.(n_street(x4) & a_topic(x1) & for(e1,e2) & Theme(e2,x5) & Actor(e2,x2) & v_do(e2) & n_pop-a-wheely(x5) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_ride(e1) & n_bike(x3) & (x1 = x2) & n_guy(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_bike(x4) & Theme(e1,x3) & Actor(e1,x2) & v_do(e1) & n_trick(x3) & (x1 = x2) & n_guy(x1))