Very good
I had a similar run in recently where a group of chavs saw me running and crossed over to where I was and deliberately got in my way, presumably to start a fight or something. Didn't work very well though, I avoided the first 3 and ran smack bang in to the last 2 knocking one of them flying (they deliberately blocked the path completely and stopped next to a parked car so I couldn't even avoid them). They shouted some abuse but I was long gone at this point.
A mate of mine was running a few years ago when a lad started running alongside him, shoving him and calling him gay names (what is it with weird folk associating running with being gay?). He simply stopped running, turned to face the lad and booted him full on in the knackers. No more trouble from him
Thankfully these things don't happen often but it is irritating.