Rear Window (1954) Easter Egg - Wheelchair!

Jimmy Stewart plays an aggressive successful photographer who broke his leg while covering a major car race. He must sit in his apartment with
a full length cast on his leg; while confined to a wheelchair.

To pass the time he spies on his neighbors through
his long photo lense camera. He does this out of the rear window to his apartment. He watches casual life through their rear windows. He studies them.

>>>> In the fourth apartment from the left is a fellow playing/composing on a piano. Behind him is a clock repairman winding a clock on the mantel. The repairman looks right at the camera.
It is the director, Alfred Hitchcock, in a brief cameo.