thanks geoldr but I use a coaster brake bicycle and according to those in the thread it won't work on it.
I was looking at a youtube video of this: http://www.youtube.com/watch?v=M3IPgvZLccI
bearing cap mod. basically he widened the sprocket hole. To bad I don't have one of those machines.
5-7heaven: yeah I carry spare chain I just wasn't as prepared as I thought. Half link may be worth checking in to. Didn't know they had half links for roller chains.