For those of you who don't know, which I'm assuming is most non-British people reading this, Trigger Happy TV was a British hidden camera show that ran from 2000-2002, started by this guy Dom Joly. According to Wikipedia, the show "did not revolve around trapping normal people into embarrassing and impossible situations. Instead, Joly often made fun of himself rather than others, and many scenes made people stop and either laugh or simply wonder what was going on; the passers-by are never made aware of the fact that they are on television, presumably until they sign a release form allowing the use of the footage shot."
This show used to be on Brazilian TV a lot and I'd watch it on weeknights before retiring into my bed at 9 pm. Below is a compilation of sketches involving Joly and a giant, novelty phone that he answers at inappropriate times, in quiet places. Believe me, it's definitely worth it to cut and paste this link into your browser and watch it.
"NAH, IT'S RUBBISH! JUST A LOT OF CHEESE AND STUFF."