喺香港為咗隱藏疑犯嘅身份，警察帶佢出去差管時會用個有兩眼窿嘅黑袋笠住佢嘅頭。
In order to hide the identity of the suspect in Hong Kong, the police would cover his head with a black bag with holes in his eyes when he took him out on an errand.