Photographing concerts is hard. This one of Blackroom at the Water Rats in London was no exception.
It’s dark and with fast movement, which is a bad combination in itself. Low light implies longer shutter speeds; movement implies the exact opposite.
But just in case you managed to figure out how best to cope with low light and animated performers, there’s the added bonus of bright, flashing lights. This throws off the automatic metering that the camera performs, leading to a dark blur or a white blur, neither particularly appealing.