[Glyptodon]

Motorcycles are somewhat like this - they're both more dangerous than cars in terms of whether you might get into an accident of any sort. But however bad they are in that sense is amplified by how many people use them like utter idiots: I've lost count of the people I've seen on them in shorts and flip-flops, let alone without a helmet, not to mention people racing them and popping wheelies at racing speeds on 35mph streets.