The time-travel theme is always an interesting concept to explore.
It looks like this person is using a cell phone, but it could be some other contraption.
http://parabook.wordpress.com/2010/10/24/time-traveller-in-charlie-chaplin-from-1928-what-do-you-think/
If this link through Parabook is true, it means that something far beyond vacuum tube technology was in use.
"a 1922-vintage mobile phone — in a glorious black-and-white film!"
http://www.pcworld.com/article/197370/1920s_mobile_phone_is_long_lost_cousin_of_iphone_4g.html
http://www.ufo-blogger.com/2010/10/time-traveler-caught-on-charlie-chaplin.html
Telephonoscope & Videophone#Early_history
cell+phone+technology+in+the+1920s & Dick_Tracy
http://www.technovelgy.com/ct/Science-Fiction-News.asp?NewsNum=570
http://www.coolest-gadgets.com/20090821/lgs-watch-phone-dick-tracy/
http://www.wired.com/gadgetlab/2010/01/new-watch-phone-w/
http://www.cbsnews.com/stories/2009/01/08/earlyshow/leisure/gamesgadgetsgizmos/main4706831.shtml
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Is this evidence of a time traveler? (TT)
http://ofscarabs.blogspot.com/2010/10/time-traveler-photo.html
Such travelers might occasionally visit what seems to be uneventful moments in time.
http://www.coasttocoastam.com/search/?query=time+travel
http://www.livescience.com/strangenews/time-traveler-chaplin-film-101028.html
http://arstechnica.com/science/news/2010/11/holographic-telepresence-streamed-over-ethernet.ars
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Of course, if someone does have this ability they would most likely want to observe key moments in time. Such possibilities have been explored in various books, movies & TV series.
Wormholes_in_fiction
Grand_Tour:_Disaster_in_Time#Plot
http://www.imdb.com/title/tt0104362/
http://www.vosmidesyatniki.com/2010/02/17/beg-vo-vremeni-timescape-1992.html
http://www.videodetective.com/movie_trailer/GRAND_TOUR-_DISASTER_IN_TIME/trailer/P00004296.htm
The Observer is part of a fictional group of humanoid looking beings that seem to travel through time & space. I once saw the shadow of one on the side of a house, but didn't look around the corner to see who or what caused such a shadow. Just another mysterious incident that I & several others can't prove.
History is full of mysteries & out of place objects & technology.
http://desertshapes.blogspot.com/2009/09/blog-post_28.html
