No one in their right mind would ever want to get pulled down into the Shanghai_tunnels.
https://www.atlasobscura.com/places/portland-s-shanghai-tunnels ,
https://www.youtube.com/watch?v=THJNPIGT6xc
"Since the mid-19th century, stories have been told about shanghai practices in Portland. Not only men but women, too were warned to take care against being drugged or kidnapped and hauled off for sale. Women were allegedly shanghaied for use as prostitutes rather than ship’s laborers. Although other ports along the West Coast including San Francisco are said to have been centers of shanghai activity, Portland’s underground tunnels are claimed to have made the practice much more manageable and wide-spread than in other areas.
According to those theories, victims were either drugged, kidnapped while intoxicated or simply knocked out, then dropped or dragged into the tunnels through trapdoors called deadfalls. Once in the tunnels, they were locked in specially designed prison cells and held captive until they were shipped off as slave laborers." https://www.legendsofamerica.com/or-shanghai
