"Now if the Bureau of Alcohol, Tobacco and Firearms comes to disarm you and they are bearing arms, resist them with arms. Go for a head shot; they're going to be wearing bulletproof vests." ... "They've got a big target on there, ATF. Don't shoot at that, because they've got a vest on underneath that. Head shots, head shots..." - Liddy
"If the Bureau of Alcohol, Tobacco and Firearms insists upon a firefight, give them a firefight. Just remember, they're wearing flak jackets and you're better off shooting for the head." - Liddy
Liddy is noted for certain unusual events in his childhood. For example: catching, cooking and eating a rat (in order to overcome a phobia to rats) and climbing a tree during a thunderstorm (in order to overcome a phobia to lightning).
One of Liddy's most famous feats of endurance would have to be where he would hold his hand on a candle flame until the flesh on his hand was burnt. According to the book "All The President's Men", he did this once at a dinner party and afterwards somebody asked, "What's the trick?" He replied, "The trick is not minding."
http://en.wikipedia.org/wiki/G._Gordon_Liddy