Remember when Pininfarina presented the Sergio Concept at the 2013 Geneva Motor Show? Seems like ages ago, right? In truth, it’s only been three years and the Italian coach builder is known for some of the most memorable concept vehicles we’ve seen in Geneva. Back in 2010, it even celebrated its 80th anniversary by rolling out the 2uettottanta Concept. That was a good one too. I’m being a little nostalgic about this because Pininfarina’s latest Geneva offering is the H2 Speed, a hydrogen-powered race car. Wait, what?