A video from a bonus feature of the DVD to Chaplin's 1928 film The Circus shows a woman talking into something she's holding up to her ear.
It appears to be a mobile phone, although they were not invented until the 1970s.
The video shown below has amassed more than two million views on YouTube.
The clip was discovered and uploaded by filmmaker George Clarke from east Belfast.
He claimed the person is a time traveller and that "you just can't explain it. Everybody had the same reaction - it looks like she's talking on a mobile phone."
Clip from 'The Circus'
Belfast filmmaker George Clarke
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? email@example.com
Try not to dwell on a recent disappointment. The sooner you recover from this setback, the faster you will achieve success. Model your behaviour after an artist you've always respected. Overcoming adversity will win the admiration of a powerful executive. If you continue to work towards your goal, you will be offered an impressive job. Getting handsomely rewarded for your communication skills will be gratifying. When one door closes, another will usually open.More