Two different drop-leaf digital clocks are shown sitting next to the red telephone on the OSI office desk in two successive shots: the first clock is a medium-sized woodgrain-cabineted model with a tan brushed-aluminum face; the next clock is a smaller dark-colored plastic-bodied model with a large adjusting-knob on the right side and a spinning stripe-patterned "seconds-counter" wheel.
The hour-hand of Joe's watch is not coordinated with the minute-hand; it "lags" by nearly half an hour: when the minute-hand is a little past the three-quarter-hour mark, the hour-hand is just past the quarter-hour mark.
When Joe is reciting the opening of the book of Genesis on the beach, his mouth movements in the two-shot of him and Rudy don't match what we hear.