You've got to have lots of hutzpa and big ego to be a: neuro-surgeon, heart specialists... That is what was told to me by my father who was an anethesiologists. They too have big egos. My father relished in the fact that he can take some one "this" close to OD/death and still keep the patient alive for the general. No room for error as he puts it. Heart surgeons are the same way... or do you have the nerve to stick a needle into someone's brain...

To be a good litigator (lawyer) you really have to have a big ego... cause he's gonna flatten his opponent no matter what. That's hutzpa.

So no, I'm not suprised by the behavior on the bike. Unfortunately, it ruins for the rest of us and puts us in harms way. I don't ride in a group. maybe in a fun ride.