Sunday competition moves on to the launching of Bangfai, judged, in various categories, for apparent height and distance travelled, with extra points for exceptionally beautiful vapour trails Those whose rockets misfire are either covered with mud, or thrown into a mud puddle (that also serves a safety function, as immediate application of cooling mud can reduce severity of burns). While popular and entertaining, the festival is also dangerous, with participants and spectators alike occasionally being injured or even killed. On 9 May 1999, a Lan 120 kg rocket exploded 50 meters above ground, just two seconds after launch, killing four persons and wounding 11.The Nation (Thailand), 1999-05-10, archive accessed 17 February 2012
