Charlie Chaplin's status as an extraordinary talent was already known - but a new web video would have him be a visionary, too.
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.
It is likely the actor is holding a hearing aid, but that has not stopped the video from amassing more than two million views on YouTube.
The clip was discovered and uploaded by Irish filmmaker George Clarke. He claimed the person is a time traveller and that "you just can't explain it".