What does an elephant, a woman in high heels and a forefoot runner have in common?

This may seem like a strange episode, but I just had a conversation with a runner who is not just a forefoot runner, but she is really a forefoot runner. Like running-on-your-tiptoes kind of forefoot runner.
 
One of the things that I brought up in our discussion were some research studies that have actually calculated the amount of pressure in the forefoot when a woman is wearing high heels. 
 
What does an elephant, a woman in high heels and a forefoot runner have in common? 
 
Well, that's what we're talking about today on the Doc On The Run Podcast.