José Lucas Costa da Silva peered over towards the warm-up area for the Brazilian jiu-jitsu competition he was about to referee, faintly amused. It was early May 2023, and the 26-year-old martial arts instructor watched as one competitor in the high-school sports auditorium stretched and ran drills. He was wearing a white “gi”, a robe-like uniform, with some unusual accessories: sunglasses, a dark blue baseball cap and a medical mask. The man, whose name was listed as Mark Elliott, was a white belt, the beginner rank.
何塞?盧卡斯?科斯塔?達(dá)席爾瓦(José Lucas Costa da Silva)向即將擔(dān)任裁判的巴西柔術(shù)比賽熱身區(qū)望去，臉上露出一絲笑意。那是2023年5月初，這位26歲的武術(shù)教練看到一位選手在高中體育館的熱身區(qū)拉伸、做熱身動(dòng)作。他身著白色“道服”（一種類似長(zhǎng)袍的制服），還搭配了一些奇特的配飾：墨鏡、深藍(lán)色棒球帽和醫(yī)用口罩。這位名叫馬克?埃利奧特(Mark Elliott)的選手是白帶級(jí)別，也就是初學(xué)者。