Can I wear a bike helmet for triathlons and multisport events, or is that just a recipe for a hot, sweaty mess on my noggin, and can someone please explain why triathletes insist on those fancy-schmancy aero helmets that look like they were designed by a committee of avant-garde artists with a penchant for 1980s sci-fi movie props, and are they really worth the extra cost and ego points? I mean, whats the worst that could happen, right, I just end up kissing the pavement with a fancy helmet that did nothing to save my bacon, all while the roadies are over there judging me for not wearing a helmet thats been aerodynamically optimized to within an inch of its life, and the mountain bikers are just shaking their heads and muttering something about roadies in lycra - so, seriously, what gives, and whats the best helmet for multisport mayhem?