The Possible

In 1969 in Thailand, "The Possible" are the most popular band. But the fame has caused the band members to have big egos. They ignore their fans. The lead singer, Toi, is cavorting with a farang woman, and is caught by his Thai girlfriend, Straw. One day, on the way to a concert, Toi finds a present that has been given to the band by a fan. It is a pink microphone called a "Hit Tester". He tries it out at first at another show being given by an upstart rival band, "The Impossibles", singing vulgar lyrics as they play one of their hit songs and disrupting the gig.
Toi then uses the mic at The Possible's own concert. During the song, there is much confusion, because the eight-piece band's trumpeter is drunk and falls off the riser. As the trombonist and saxophonist step offstage to retrieve their bandmate, there is a flash of light and the remaining five members of the band disappear. They then reappear in what appears to be the same auditorium, only now they are blocking the view of a pornographic film and are booed offstage by the male audience.
The band then walks out onto the street and find that Bangkok looks a lot different than it did when the concert started, the most noticeable difference is the skytrain and increased noise pollution and traffic. Slowly, it dawns on them that they have traveled in time 37 years in the future to 2006.