I always thought it was a combination of being to into smartphone, passive aggressiveness, and weak attempt to bump into foreigners.... I just look forward and keep going... when they bang into my arm, it usually spins them around (not like the spinners
@MikeH likes) but none-the-less spin... One was a girl and she lost her balance and fell flat on her ass... to busy watching the smartphone and not her path..... I offered my hand to help her up... she obliged and we exchanged LINE details.... in a follow up msg offered her a massage for her soreness and then proceeded to bang her one night.... turned out to be a good Nampa technique for her...LOL
Old ladies on the bike however, best to get out of their way... they hit and run all the time... never use their bell... just once I would like to catch their handlebars to make them crash... is that mean ? ? ?