Booby-Trapped Roof

I am in a street. There is a sort of strange building which I approach. There is a set of stairs along the side of the building. I go up and start walking toward the edge of the building in order to look out onto the street. I trip some kind of invisible booby-trap. It flings me into the air and an eye appears before me, glowing an eeirie green.

After flinging me into the air it places me back on the roof of the building. My father, Bill, is there. I don't know if I am comforted by his presence or if he is here to criticize my falling for the trap.