In my opinion, this question is off-topic: Instruments that challenge your ear
It asks for a list of unusual instruments. As a list question, it doesn't have a single answer and is effectively a shopping cart question. Do you agree, or am I being too harsh?
If we agree the question is off-topic, someone should close it. It's at 4 close votes. I think it's especially important the question is closed because it's currently in the hot questions list, meaning that we're potentially being represented by an off-topic question.