Heel Hook not so good

Sam, Mike, and I were on the blacktop basketball court behind the PD today and working on some grapplin' and I discovered something useful for y'all: The heel hook hurts when your presumed victim has shoes on. This is one of those theoretically excellent techniques that doesn't pan out in the real world. I got the reality check when I tried to crank it on Sam. It worked great on Mike, who, like me, was wearing some wrestling shoes, but when I tried to apply it to Sam, the pain in my arm from his harder-soled running shoes prevented me from getting it to work. Note to self: If I ever meet Ken Shamrock in a dark alley, make sure to wear boots or Sam's running shoes!