A triptych of tales--the Tanzanian laughing epidemic of 1962; clapping for Stalin in 1937; and a more recent neurological abyss of constant forgetting -- culminating in a climactic postscript...
The truly horrifying thing about the dropping of the bombs on Hiroshima and Nagasaki (and why it should be regarded as the greatest war crime in history) is that the Japanese surrender had already been largely negotiated with the US. The reason why Hiroshima and Nagasaki had been left untouched by US bombing was specifically because they wanted to see the effect of the A-bomb on completely intact cities. It's horrible. Instead of being ostracised for it, the US has gone on to wield the largest and bloodiest empire in the history of the world and the world falls over itself to pander to its whims.
The event in Tanzania is reminiscent of the Dancing Plague that overtook Europe in the middle ages. Gareth Brooks created a beautiful novel with embroidered illustrations on that event. The novel Blindness by Jose Saramago is an account of a fictionalised mass hysterical event that causes blindness in the entire population. It's a captivating read.
A similar convergence appears here: