Other forms: afterclaps
People may think a period of political unrest is over once the government has restored order — but then there may be an afterclap as a slew of protesters take to the streets demanding the police chief resign for not acting soon enough.
The clap in afterclap is like the one in thunderclap: a sudden, loud noise — but in this case, it's an unsettling development that comes after people have stopped expecting it. Imagine a thunderstorm full of loud, crashing peals of thunder. It dies down, the sky clears, and the storm is past. But then, all of a sudden, there's another loud clap of thunder! That's the image suggested by the word afterclap: a complex, chaotic situation seems to be over, and then it turns out that it's not.