So I've been reading week after week about cyclists getting attacked on the road and on the trail, and while its not always feasible, it seems the best thing is to ride in larger groups. Some people carry pepper spray and I was thinking about doing the same, but before I go out and buy a can, can anybody here comment on its effectiveness? I mean if someone attacks you on the trail, its unlikely they are going to just slowly walk up to you, knife-in-hand and give you time. The would most probably jump out of the bushes or knock you off of your bike. Has anybody here successfully chased a would-be mugger with pepper spray before? What was the situation?