The ponies of Equestria were the most psychologically broken species to ever develop sentience, and just about every last one of them was due for a break-down at some point in their lives. There was something in their nature, probably the herd mentality, which made them prone to fits of fearful panic and wild overreactions. While crystal ponies might be a bit more levelheaded than their matte-coated cousins, who had refined the concept of pandemonium down to an art, they were nonetheless a powder keg in large groups. 