small white circles on films

[jimschrader]

can anyone tell me what are those little white circles that appear at the end of a movie or just before a commercial back when television stations used 16mm stock to show tv shows ,even at the end of most cartoons there is a little star looking thing that appears these only last about maybe a second or less?????

[rollemfilm]

Those are projector sync marks. They tell the
projectionist when to start the next reel.

[ekoe]

see 'fightclub', it addresses this question. and in a more entertaining manner than we can offer here.