Here is something from my old neck of the woods
On April 13, 1928,[13] for reasons still unknown, a violent explosion occurred in downtown West Plains. About 60 people had gathered in the Bond Dance Hall, which was on the second floor of a building on East Main Street. The explosion was reported to be felt for miles, even in Pomona, which is approximately ten miles from West Plains. Windows were shattered throughout the block, and cars were also warped on the street. The explosion also damaged the nearby Howell County Courthouse so badly that it was vacated and left until late 1933, when it was demolished by the Civil Works Administration.[14] 37 people were killed in the explosion, and 22 people were injured. 20 of those killed were never positively identified and buried in a mass grave at Oak Lawn Cemetery in the southeast part of town. Today, they are memorialized by the Rock of Ages monument, erected on October 6, 1929.[15] The explosion has also been remembered in a folk song recorded 30 years later.[16]
The cause of the explosion is still a topic of controversy nearly a century after the blast. Numerous causes for the explosion have been offered, but a definitive story has never been proven to be true. The most widely accepted theory is that the explosion somehow originated from leaking gasoline in a garage owned by J. W. Wiser, which happened to be on the floor below. Because Wiser was at the garage at the time, some have speculated that the blast was intentionally caused by Wiser as a suicide attempt, which his wife reportedly refused to acknowledge. In addition, the late West Plains native Robert Neathery explained in his 1994 book, West Plains As I Knew It, that a truck containing dynamite parked in the garage may have been the cause, indirectly part of a crime in which someone shot Wiser and set a fire to cover up the crime, and the dynamite exploded.[17]
https://en.wikipedia.org/wiki/West_Plains,_Missouri
I just ordered the book called The West Plains Dance Hall Explosion,
https://maxhunter.missouristate.edu/...on.aspx?ID=113
https://www.youtube.com/watch?v=O1orwIFOn3A The last song they heard before the explosion, right in the middle of the song is when the explosion happened.