In Reply To:
I can't believe no one said anything to you!
I can!
Anyone who might have passed him during the bike leg would have been in to big of a hurry to bother mentioning it and the people he was passing had to have been far to embarassed about the fact that they just got passed by a goofy guy wearing his helmet backwards to mention to him that his helmet was on backwards!
Last year I was just getting started on a training ride at the park, I noticed a guy riding a K-mart/Walmart level sport comfort bike finishing up a lap with his kids on the traffic loop. He and his kids were having a balst and he was grinning from ear to ear but I couldn't help notice that his helmet was on backwards and mentioned it to him. He looked at his kids - who all started looking off in different directions - and said, "I thought you said this was the correct way to wear this helmet!" I could not help but feel like the janitor in Frazz as his kids burst out laughing while I showed the dad how to properly wear the helmet!
¯\_(ツ)_/¯