When I was young and my family shopped at the local department store, the x-ray machine in their shoe department wasn't usually watched by the employees. My brother & I used to play with the machine, zapping our feet even if we weren't buying shoes that day.
Of course, we also rode our bikes in the cloud spread by the DDT trucks, following them as they drove through the neighborhood.
Going back a way, in the locker room of High School gym class, one moron went on very loudly about the ending of Charlton Heston's 'Planet of the Apes' that he saw on opening day, before most of us got a chance to see it.
I was tired of the hype we got on BBC America for *months* before the broadcast - "We're going someplace we've never been before - America!" The Doctor has been to America before, most recently the 10th was in New York City at the Empire State Building. I realize that the big deal this time is that the episode was actually filmed in the States, but the location should not be second to story.
Another image that stuck with me from the original series was when Abraham Bernstein took a paint spray can from a kid & sprayed a red 'V' over a Visitor's poster. "The 'V' stands for 'Victory.' Do you understand? Tell your friends." and hands him back the spray can. Cool!
Was in SF for business in the mid '90s & heard the local newsreader attempt to read out a URL associated with a story he'd just presented: "h-t-t-p-colon-backslash-backslash-w-w-w-dot-k-a-b-c-dot-c-o-m-backslash-s-t-o-r-y-dot-c-o-m" He spelled this out even though the URL was displayed on-screen. Took a real long time.
(KABC weren't the call letters, I just don't remember what they were)