This is the second time this year that this has happened to me. I was kind of embarrassed to mention the first time as I was in Las Vegas, so it stayed in Vegas. I was heading back to my Hotel at Fremont Street. I was one block west of the main street thru there riding fast on empty streets full of apartments. Suddenly two young men came flying out of a door and just missed tackling me as I bunny hopped the curb and dashed up the sidewalk and thru some landscaping. I could hear them right behind me for a moment till they pulled up out of breath. I looked back to see them laughing and swigging beers. This time it was closer to home so I thought I would mention it. I ride a loop twice a week that involves riding a mile up Main street in Santa Ana just south of the 5 fwy and crossing the bridge to the bike trail across from Discovery Science Center. On Saturday there was a lot of traffic on Main so I went one street to the east. It was an empty street with large trees and was shady and nice. Then two men jumped over a bannister and tried to corner me into a wall and a house but I accelerated out of there and they missed the final lunge. There was a chain crossing the end of the street blocking my exit into a parking lot but as I slowed for it I saw a footpath to the side and was out of there. Both close calls. I've been riding along time but this seems like a new threat emerging. I have a weapon now. But I wish I didn't have too. Has this happened to anybody else ? I'm pretty low profile, not a dress up or showy in any way. Just kinda fast.