Time travellers attempting to blend in run into problems when they don’t know that they’re not using the right language.
Cheesy 80’s Kids Shows, where sly end-of-episode comments are a private joke between the protagonists and the audience.
Corporate executives combine the powers of their ludicrously expensive watches to form … Captain OfIndustry!
Backwards & Ford: Gerald Ford travels through time, possibly with a team of plucky youngsters, righting wrongs & setting history straight. (Possibly battling Evil Nixon in an effort to restore Good Nixon, or maybe subtly influencing the timeline to produce the best possible Nixon )
A group of police officers notice that the weirdness they’re seeing matches elements from their theological or cultural backgrounds. Many different cultural or theological backgrounds.
When aliens issue a challenge for dominance, electric cart jousting is the only logical option.
Time Travelling Teddy Roosevelt & His Time Travelling Rough Riders
( This link might work, or you might need to be an RPG.net member and be given access to the specific board ~ T. Jones )