I havent personally, although I did tickle a girl once whose feet were flailing around, and almost kicked me in the head. One time, before I joined TMF, I got a letter from a pen pal, who told me she accidently kicked her hubby in the crotch, because he was holding her down and tickling her soles, and her foot flailed and got him in the crotch. After the stories I've heard on here, I will be very careful when I get a girlfriend again to have her tied so she cant get me in any sensitive areas if I'm tickling her.
Mitch