SCRAPE YOUR HEEL DOWN THE SIDE OF HIS SHIN
If you are approached from behind, one of the most effective ways to throw off your attacker is to run your heel down the front of their shin - the prominent bone found in the lower part of the leg. This is a fine bone and even if your attacker is well built, this bone tends to stick out. Simply lift up your heel and scrape your heel down the front of your assailant's shin bone as hard as possible. Most footwear is capable of causing pain and damage, but heels are even better.