Bit my tongue and now I need to vent (Page 2)

I didn't think Canadians knew how to throw elbows...

Actually, I think by FAR the most likely answer here - 

He didn't see you there, and somehow, his elbow ended up bumping into you. I'm sure it felt as if he intentionally pushed you out of his way, but that may be due to adrenaline, difference in weight, and not paying attention.

I actually highly doubt anyone would be such a D-bag, particularly when it's not a race in the slightest, and you could moreover just grab him either there or at the end of the workout and give it to him.

Not implying that you're oversensitive here - I'm sure anyone would have felt wronged, but I do think in this situation the FAR more likely scenario is that it was a completely unintentional bump and he likely doesn't even realize how offended you felt.

I've been on the giving and receiving side of such incidents, in practice and in races. I recall being thrown to the side of the road in a race before transition, and after the race, the guy who did it (super nice guy actually) had no idea he had even hit me - he said he had stumbled briefly. I myself have nearly taken out two speedy ladies who decelerated in a finishing 5k downhill when I thought I could squeeze between them - I apologized profusely after the race for the obvious bad behavior, and they were fortunately very good sports about it.

Amateur athletes are generally a great bunch - the bad apples are often well known.

I've actually gotten a lot more heat an attitude from pro female  triathletes who show up at the weekend bike hammerfests (the males are too fast to ride anywhere near me) than any amateurs - I suspect the stakes are much higher and the pressure is on for them, so I tend to give them a pass.

You're getting too rational.  Just let us all continue to call this guy a douche bag.

If he does it again, THAT's the line I would use!