Public Harassment: Against a wall

Getting off metro and going south on the pedestrian trail, a man started whispering underneath his breath at me while walking towards me. He eventually cornered me against a building and kept whispering to me underneath his breath. I slipped away between him and the wall and walked briskly towards the more populated street. There was a group of men near the metro station entrance that watched this unfold and did absolutely nothing, and some even smiled.