People are not accused of shoplifting until he/she has left the store; otherwise, he/she can claim they were going to pay before leaving.
You can't flag a particular barcode. Every copy of that particular book will have the exact same barcode.
When Kramer (Michael Richards) attaches the hose to Jerry's (Jerry Seinfeld) kitchen sink, the sink is moving and it's clear it's not attached to the counter.
The beer stein in Elaine's apartment is beside the bookstore's cash register.
When George tries to return the book, there's an external shot of the bookstore showing Christmas wreathes in the windows. This episode aired in April.
As Zach is being run over by the rickshaw, production company trucks, traffic cones and set police are visible in background.
Book mic visible when Kramer is taking to the spoon.
White Los Angeles taxi is seen in the background.
Blue street signs reveal the filming location of the final rickshaw scene as Los Angeles.
There are no slanted streets in Manhattan.
Pederman uses Xhosa, a South African language, but attributes it to PNG.
Peterman quotes someone from Papua New Guinea, but then proceeds to speak in a clicking language, which belongs to Africa, not PNG.
Peterman (John O'Hurley) asks Elaine (Julia Louis-Dreyfus) to help Zach get off the drugs, yet in episode 7.15 The Shower Head (1996), he is furious when he believes Elaine to be an addict and came close to firing her.