I and some chums set some off in March late at night, from a footbridge over a railway line in the sticks, to ensure we missed any trees. All went well until one of them failed to rise for some reason. - it just sank slowly down onto the railway track where it sat in the path of the London Exeter express like an emergency stop beacon, and the damn thing just woudn't go out.
Suddenly the fun drained out as we imagined the consequences of our fun and the prospect of arrest loomed.
In the event the train hammered through it giving a blast on the horn - I hope the driver didn't have a heart attack.
I am less of a fan of the lanterns now and all I can think about is flaming thatched roofs and crops, and cows with wire in them.