Holy laughter can occur no matter the topic being addressed by the current speaker from the pulpit - even when the speaker is expounding on such matters as Eternal Judgment and Hell. It is taught in such settings that this is a supernatural manifestation which indicates a special in-filling of the individual by the Holy Spirit.
Although this phenomenon has been reported in isolated instances for the past one hundred years or so, holy laughter first attracted widespread attention in the early 1990s as one of the typical manifestations involved with the Toronto Blessing movement.
The most prominent individual connected with this type of behavior was South African evangelist Rodney Howard-Browne, who styles himself "Joel's Bartender." This is a reference to the prophecy in the Bible in Joel 2 regarding the pouring out of the Holy Spirit (Joel 2:28 - 30).
Those who are overcome with Holy Laughter at Howard-Browne's meetings are viewed as being "drunk with (or in) the Holy Spirit," and some do behave as if physically intoxicated, to the point that they are unable to drive home from meetings.