Harold Lloyd hanging from the clock is one of the most famous images in silent cinema but this neatly paced silent comedy has lots of great gags before we get to the climb which climaxes in that. One of the best sequences has Harold rushing to get to his work on time. The thrill sequence is astonishing and looks totally realistic. Even when you know how it was done it retains its power.A wonderful film to watch as an escape from everyday reality it will put a smile on your face and have you on the edge of your seat at the same time.
 

The human fly was Bill Strother and he doubled for Lloyd in the long shots. The building Lloyd climbs up is in fact a set which wasn't as high as you see in the film, careful use of camera angles completed the illusion.

The climb was remade to lesser effect in sound for Feet First (1930).