 This was the first Harold Lloyd (qv) film to take advantage of the  location of the main studio. It was situated on a hill which was  over the Hill Street tunnel that included a terrace at the top of  the tunnel opening which overlooked Hill Street and the surrounding  cityscape. Hal Roach discovered that as long as the railing facing  the street was kept out of the frame, it appeared that anything shot  on the terrace was up on a dizzying height above the city. Thus  Hal Roach (qv) and Harold Lloyd were able to use this illusion to  stage scenes and stunts that appeared to have the characters up at  great heights in the city, when actually the actors were on  relatively low structures that were a few metres at most above the  terrace floor.