it's the second bounce that kills you. First shatters bones; the second drives them into organs.
Madness string 101792
One of the practical ramifications of this finding - that the strict regimentation of ant society into castes helps protect their young and their queens from epidemics - is that if you get your kid one of those ant colony toys for Christmas, the resultant ant infestation in your house will be long lived and resistant to epidemics.