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Justice Yeldham is known for his unique, dramatic, and physically harmful performance methods. Yeldham performs with amplified shards of glass which he hold against his mouth and lips in various ways to create a unique set of sounds. He considers the tone of his work to be a collective anxiety that he shares with the audience who are spectators to his self flagellation.
https://hyperallergic.com/223023/the-artist-who-turns-glass-shards-and-iv-drips-into-instruments/