My childhood was in a Pentecostal church and this would randomly happen with out warning during a service - and when it did the service would run long. Normally I would get out at 12:30 so 11-12 was singing, 10-11 Sunday school and 12-12:30 at best the preaching would end but it was probably 1 in 6 where one could describe is as mass hysteria with loud singing , speaking in tongues and falling to the floor. Those would run and extra hour at least which gave very little time for play being you had to be back there for evening service. 10/10 would not recommend.