Pretty interesting. Apparently purse snatchers on motorbikes were a big problem in Guangzhou and the local police started using a modified version of the hook spear to catch the robbers. What's neat is they got the idea because one of the cop was a fan of the classic Water Margins story and in it the weapon was used against horses.
http://news.sohu.com/2003/12/17/21/news217002127.shtml